Description: Lemma for 4001prm . Calculate a power mod. In decimal, we calculate 2 ^ 4 0 0 = ( 2 ^ 2 0 0 ) ^ 2 == 9 0 2 ^ 2 = 2 0 3 N + 1 4 0 1 and 2 ^ 8 0 0 = ( 2 ^ 4 0 0 ) ^ 2 == 1 4 0 1 ^ 2 = 4 9 0 N + 2 3 1 1 == 2 3 1 1 . (Contributed by Mario Carneiro, 3-Mar-2014) (Revised by Mario Carneiro, 20-Apr-2015) (Proof shortened by AV, 16-Sep-2021)
Ref | Expression | ||
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Hypothesis | 4001prm.1 | |- N = ; ; ; 4 0 0 1 |
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Assertion | 4001lem2 | |- ( ( 2 ^ ; ; 8 0 0 ) mod N ) = ( ; ; ; 2 3 1 1 mod N ) |
Step | Hyp | Ref | Expression |
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1 | 4001prm.1 | |- N = ; ; ; 4 0 0 1 |
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2 | 4nn0 | |- 4 e. NN0 |
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3 | 0nn0 | |- 0 e. NN0 |
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4 | 2 3 | deccl | |- ; 4 0 e. NN0 |
5 | 4 3 | deccl | |- ; ; 4 0 0 e. NN0 |
6 | 1nn | |- 1 e. NN |
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7 | 5 6 | decnncl | |- ; ; ; 4 0 0 1 e. NN |
8 | 1 7 | eqeltri | |- N e. NN |
9 | 2nn | |- 2 e. NN |
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10 | 9nn0 | |- 9 e. NN0 |
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11 | 2 10 | deccl | |- ; 4 9 e. NN0 |
12 | 11 3 | deccl | |- ; ; 4 9 0 e. NN0 |
13 | 12 | nn0zi | |- ; ; 4 9 0 e. ZZ |
14 | 1nn0 | |- 1 e. NN0 |
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15 | 14 2 | deccl | |- ; 1 4 e. NN0 |
16 | 15 3 | deccl | |- ; ; 1 4 0 e. NN0 |
17 | 16 14 | deccl | |- ; ; ; 1 4 0 1 e. NN0 |
18 | 2nn0 | |- 2 e. NN0 |
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19 | 3nn0 | |- 3 e. NN0 |
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20 | 18 19 | deccl | |- ; 2 3 e. NN0 |
21 | 20 14 | deccl | |- ; ; 2 3 1 e. NN0 |
22 | 21 14 | deccl | |- ; ; ; 2 3 1 1 e. NN0 |
23 | 18 3 | deccl | |- ; 2 0 e. NN0 |
24 | 23 3 | deccl | |- ; ; 2 0 0 e. NN0 |
25 | 23 19 | deccl | |- ; ; 2 0 3 e. NN0 |
26 | 25 | nn0zi | |- ; ; 2 0 3 e. ZZ |
27 | 10 3 | deccl | |- ; 9 0 e. NN0 |
28 | 27 18 | deccl | |- ; ; 9 0 2 e. NN0 |
29 | 1 | 4001lem1 | |- ( ( 2 ^ ; ; 2 0 0 ) mod N ) = ( ; ; 9 0 2 mod N ) |
30 | 24 | nn0cni | |- ; ; 2 0 0 e. CC |
31 | 2cn | |- 2 e. CC |
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32 | eqid | |- ; ; 2 0 0 = ; ; 2 0 0 |
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33 | eqid | |- ; 2 0 = ; 2 0 |
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34 | 2t2e4 | |- ( 2 x. 2 ) = 4 |
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35 | 31 | mul02i | |- ( 0 x. 2 ) = 0 |
36 | 18 18 3 33 34 35 | decmul1 | |- ( ; 2 0 x. 2 ) = ; 4 0 |
37 | 18 23 3 32 36 35 | decmul1 | |- ( ; ; 2 0 0 x. 2 ) = ; ; 4 0 0 |
38 | 30 31 37 | mulcomli | |- ( 2 x. ; ; 2 0 0 ) = ; ; 4 0 0 |
39 | eqid | |- ; ; ; 1 4 0 1 = ; ; ; 1 4 0 1 |
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40 | 6nn0 | |- 6 e. NN0 |
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41 | 14 40 | deccl | |- ; 1 6 e. NN0 |
42 | eqid | |- ; ; 4 0 0 = ; ; 4 0 0 |
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43 | eqid | |- ; ; 1 4 0 = ; ; 1 4 0 |
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44 | eqid | |- ; 1 4 = ; 1 4 |
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45 | 4p2e6 | |- ( 4 + 2 ) = 6 |
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46 | 14 2 18 44 45 | decaddi | |- ( ; 1 4 + 2 ) = ; 1 6 |
47 | 00id | |- ( 0 + 0 ) = 0 |
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48 | 15 3 18 3 43 33 46 47 | decadd | |- ( ; ; 1 4 0 + ; 2 0 ) = ; ; 1 6 0 |
49 | eqid | |- ; 4 0 = ; 4 0 |
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50 | 41 | nn0cni | |- ; 1 6 e. CC |
51 | 50 | addid1i | |- ( ; 1 6 + 0 ) = ; 1 6 |
52 | eqid | |- ; ; 2 0 3 = ; ; 2 0 3 |
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53 | ax-1cn | |- 1 e. CC |
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54 | 53 | addid1i | |- ( 1 + 0 ) = 1 |
55 | 14 | dec0h | |- 1 = ; 0 1 |
56 | 54 55 | eqtri | |- ( 1 + 0 ) = ; 0 1 |
57 | 53 | addid2i | |- ( 0 + 1 ) = 1 |
58 | 57 14 | eqeltri | |- ( 0 + 1 ) e. NN0 |
59 | 4cn | |- 4 e. CC |
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60 | 4t2e8 | |- ( 4 x. 2 ) = 8 |
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61 | 59 31 60 | mulcomli | |- ( 2 x. 4 ) = 8 |
62 | 59 | mul02i | |- ( 0 x. 4 ) = 0 |
63 | 62 57 | oveq12i | |- ( ( 0 x. 4 ) + ( 0 + 1 ) ) = ( 0 + 1 ) |
64 | 63 57 | eqtri | |- ( ( 0 x. 4 ) + ( 0 + 1 ) ) = 1 |
65 | 18 3 58 33 2 61 64 | decrmanc | |- ( ( ; 2 0 x. 4 ) + ( 0 + 1 ) ) = ; 8 1 |
66 | 2p1e3 | |- ( 2 + 1 ) = 3 |
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67 | 3cn | |- 3 e. CC |
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68 | 4t3e12 | |- ( 4 x. 3 ) = ; 1 2 |
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69 | 59 67 68 | mulcomli | |- ( 3 x. 4 ) = ; 1 2 |
70 | 14 18 66 69 | decsuc | |- ( ( 3 x. 4 ) + 1 ) = ; 1 3 |
71 | 23 19 3 14 52 56 2 19 14 65 70 | decmac | |- ( ( ; ; 2 0 3 x. 4 ) + ( 1 + 0 ) ) = ; ; 8 1 3 |
72 | 25 | nn0cni | |- ; ; 2 0 3 e. CC |
73 | 72 | mul01i | |- ( ; ; 2 0 3 x. 0 ) = 0 |
74 | 73 | oveq1i | |- ( ( ; ; 2 0 3 x. 0 ) + 6 ) = ( 0 + 6 ) |
75 | 6cn | |- 6 e. CC |
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76 | 75 | addid2i | |- ( 0 + 6 ) = 6 |
77 | 40 | dec0h | |- 6 = ; 0 6 |
78 | 74 76 77 | 3eqtri | |- ( ( ; ; 2 0 3 x. 0 ) + 6 ) = ; 0 6 |
79 | 2 3 14 40 49 51 25 40 3 71 78 | decma2c | |- ( ( ; ; 2 0 3 x. ; 4 0 ) + ( ; 1 6 + 0 ) ) = ; ; ; 8 1 3 6 |
80 | 73 | oveq1i | |- ( ( ; ; 2 0 3 x. 0 ) + 0 ) = ( 0 + 0 ) |
81 | 3 | dec0h | |- 0 = ; 0 0 |
82 | 80 47 81 | 3eqtri | |- ( ( ; ; 2 0 3 x. 0 ) + 0 ) = ; 0 0 |
83 | 4 3 41 3 42 48 25 3 3 79 82 | decma2c | |- ( ( ; ; 2 0 3 x. ; ; 4 0 0 ) + ( ; ; 1 4 0 + ; 2 0 ) ) = ; ; ; ; 8 1 3 6 0 |
84 | 31 | mulid1i | |- ( 2 x. 1 ) = 2 |
85 | 53 | mul02i | |- ( 0 x. 1 ) = 0 |
86 | 14 18 3 33 84 85 | decmul1 | |- ( ; 2 0 x. 1 ) = ; 2 0 |
87 | 67 | mulid1i | |- ( 3 x. 1 ) = 3 |
88 | 87 | oveq1i | |- ( ( 3 x. 1 ) + 1 ) = ( 3 + 1 ) |
89 | 3p1e4 | |- ( 3 + 1 ) = 4 |
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90 | 88 89 | eqtri | |- ( ( 3 x. 1 ) + 1 ) = 4 |
91 | 23 19 14 52 14 86 90 | decrmanc | |- ( ( ; ; 2 0 3 x. 1 ) + 1 ) = ; ; 2 0 4 |
92 | 5 14 16 14 1 39 25 2 23 83 91 | decma2c | |- ( ( ; ; 2 0 3 x. N ) + ; ; ; 1 4 0 1 ) = ; ; ; ; ; 8 1 3 6 0 4 |
93 | eqid | |- ; ; 9 0 2 = ; ; 9 0 2 |
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94 | 8nn0 | |- 8 e. NN0 |
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95 | 14 94 | deccl | |- ; 1 8 e. NN0 |
96 | 95 3 | deccl | |- ; ; 1 8 0 e. NN0 |
97 | eqid | |- ; 9 0 = ; 9 0 |
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98 | eqid | |- ; ; 1 8 0 = ; ; 1 8 0 |
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99 | 95 | nn0cni | |- ; 1 8 e. CC |
100 | 99 | addid1i | |- ( ; 1 8 + 0 ) = ; 1 8 |
101 | 1p2e3 | |- ( 1 + 2 ) = 3 |
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102 | 101 19 | eqeltri | |- ( 1 + 2 ) e. NN0 |
103 | 9t9e81 | |- ( 9 x. 9 ) = ; 8 1 |
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104 | 9cn | |- 9 e. CC |
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105 | 104 | mul02i | |- ( 0 x. 9 ) = 0 |
106 | 105 101 | oveq12i | |- ( ( 0 x. 9 ) + ( 1 + 2 ) ) = ( 0 + 3 ) |
107 | 67 | addid2i | |- ( 0 + 3 ) = 3 |
108 | 106 107 | eqtri | |- ( ( 0 x. 9 ) + ( 1 + 2 ) ) = 3 |
109 | 10 3 102 97 10 103 108 | decrmanc | |- ( ( ; 9 0 x. 9 ) + ( 1 + 2 ) ) = ; ; 8 1 3 |
110 | 9t2e18 | |- ( 9 x. 2 ) = ; 1 8 |
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111 | 104 31 110 | mulcomli | |- ( 2 x. 9 ) = ; 1 8 |
112 | 1p1e2 | |- ( 1 + 1 ) = 2 |
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113 | 8p8e16 | |- ( 8 + 8 ) = ; 1 6 |
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114 | 14 94 94 111 112 40 113 | decaddci | |- ( ( 2 x. 9 ) + 8 ) = ; 2 6 |
115 | 27 18 14 94 93 100 10 40 18 109 114 | decmac | |- ( ( ; ; 9 0 2 x. 9 ) + ( ; 1 8 + 0 ) ) = ; ; ; 8 1 3 6 |
116 | 28 | nn0cni | |- ; ; 9 0 2 e. CC |
117 | 116 | mul01i | |- ( ; ; 9 0 2 x. 0 ) = 0 |
118 | 117 | oveq1i | |- ( ( ; ; 9 0 2 x. 0 ) + 0 ) = ( 0 + 0 ) |
119 | 118 47 81 | 3eqtri | |- ( ( ; ; 9 0 2 x. 0 ) + 0 ) = ; 0 0 |
120 | 10 3 95 3 97 98 28 3 3 115 119 | decma2c | |- ( ( ; ; 9 0 2 x. ; 9 0 ) + ; ; 1 8 0 ) = ; ; ; ; 8 1 3 6 0 |
121 | 18 10 3 97 110 35 | decmul1 | |- ( ; 9 0 x. 2 ) = ; ; 1 8 0 |
122 | 18 27 18 93 121 34 | decmul1 | |- ( ; ; 9 0 2 x. 2 ) = ; ; ; 1 8 0 4 |
123 | 28 27 18 93 2 96 120 122 | decmul2c | |- ( ; ; 9 0 2 x. ; ; 9 0 2 ) = ; ; ; ; ; 8 1 3 6 0 4 |
124 | 92 123 | eqtr4i | |- ( ( ; ; 2 0 3 x. N ) + ; ; ; 1 4 0 1 ) = ( ; ; 9 0 2 x. ; ; 9 0 2 ) |
125 | 8 9 24 26 28 17 29 38 124 | mod2xi | |- ( ( 2 ^ ; ; 4 0 0 ) mod N ) = ( ; ; ; 1 4 0 1 mod N ) |
126 | 5 | nn0cni | |- ; ; 4 0 0 e. CC |
127 | 18 2 3 49 60 35 | decmul1 | |- ( ; 4 0 x. 2 ) = ; 8 0 |
128 | 18 4 3 42 127 35 | decmul1 | |- ( ; ; 4 0 0 x. 2 ) = ; ; 8 0 0 |
129 | 126 31 128 | mulcomli | |- ( 2 x. ; ; 4 0 0 ) = ; ; 8 0 0 |
130 | eqid | |- ; ; ; 2 3 1 1 = ; ; ; 2 3 1 1 |
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131 | 18 94 | deccl | |- ; 2 8 e. NN0 |
132 | eqid | |- ; ; 2 3 1 = ; ; 2 3 1 |
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133 | eqid | |- ; 4 9 = ; 4 9 |
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134 | 7nn0 | |- 7 e. NN0 |
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135 | 7p1e8 | |- ( 7 + 1 ) = 8 |
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136 | eqid | |- ; 2 3 = ; 2 3 |
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137 | 4p3e7 | |- ( 4 + 3 ) = 7 |
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138 | 59 67 137 | addcomli | |- ( 3 + 4 ) = 7 |
139 | 18 19 2 136 138 | decaddi | |- ( ; 2 3 + 4 ) = ; 2 7 |
140 | 18 134 135 139 | decsuc | |- ( ( ; 2 3 + 4 ) + 1 ) = ; 2 8 |
141 | 9p1e10 | |- ( 9 + 1 ) = ; 1 0 |
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142 | 104 53 141 | addcomli | |- ( 1 + 9 ) = ; 1 0 |
143 | 20 14 2 10 132 133 140 142 | decaddc2 | |- ( ; ; 2 3 1 + ; 4 9 ) = ; ; 2 8 0 |
144 | 131 | nn0cni | |- ; 2 8 e. CC |
145 | 144 | addid1i | |- ( ; 2 8 + 0 ) = ; 2 8 |
146 | 31 | addid1i | |- ( 2 + 0 ) = 2 |
147 | 146 18 | eqeltri | |- ( 2 + 0 ) e. NN0 |
148 | eqid | |- ; ; 4 9 0 = ; ; 4 9 0 |
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149 | 4t4e16 | |- ( 4 x. 4 ) = ; 1 6 |
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150 | 6p3e9 | |- ( 6 + 3 ) = 9 |
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151 | 14 40 19 149 150 | decaddi | |- ( ( 4 x. 4 ) + 3 ) = ; 1 9 |
152 | 9t4e36 | |- ( 9 x. 4 ) = ; 3 6 |
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153 | 2 2 10 133 40 19 151 152 | decmul1c | |- ( ; 4 9 x. 4 ) = ; ; 1 9 6 |
154 | 62 146 | oveq12i | |- ( ( 0 x. 4 ) + ( 2 + 0 ) ) = ( 0 + 2 ) |
155 | 31 | addid2i | |- ( 0 + 2 ) = 2 |
156 | 154 155 | eqtri | |- ( ( 0 x. 4 ) + ( 2 + 0 ) ) = 2 |
157 | 11 3 147 148 2 153 156 | decrmanc | |- ( ( ; ; 4 9 0 x. 4 ) + ( 2 + 0 ) ) = ; ; ; 1 9 6 2 |
158 | 12 | nn0cni | |- ; ; 4 9 0 e. CC |
159 | 158 | mul01i | |- ( ; ; 4 9 0 x. 0 ) = 0 |
160 | 159 | oveq1i | |- ( ( ; ; 4 9 0 x. 0 ) + 8 ) = ( 0 + 8 ) |
161 | 8cn | |- 8 e. CC |
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162 | 161 | addid2i | |- ( 0 + 8 ) = 8 |
163 | 94 | dec0h | |- 8 = ; 0 8 |
164 | 160 162 163 | 3eqtri | |- ( ( ; ; 4 9 0 x. 0 ) + 8 ) = ; 0 8 |
165 | 2 3 18 94 49 145 12 94 3 157 164 | decma2c | |- ( ( ; ; 4 9 0 x. ; 4 0 ) + ( ; 2 8 + 0 ) ) = ; ; ; ; 1 9 6 2 8 |
166 | 159 | oveq1i | |- ( ( ; ; 4 9 0 x. 0 ) + 0 ) = ( 0 + 0 ) |
167 | 166 47 81 | 3eqtri | |- ( ( ; ; 4 9 0 x. 0 ) + 0 ) = ; 0 0 |
168 | 4 3 131 3 42 143 12 3 3 165 167 | decma2c | |- ( ( ; ; 4 9 0 x. ; ; 4 0 0 ) + ( ; ; 2 3 1 + ; 4 9 ) ) = ; ; ; ; ; 1 9 6 2 8 0 |
169 | 59 | mulid1i | |- ( 4 x. 1 ) = 4 |
170 | 104 | mulid1i | |- ( 9 x. 1 ) = 9 |
171 | 14 2 10 133 169 170 | decmul1 | |- ( ; 4 9 x. 1 ) = ; 4 9 |
172 | 85 | oveq1i | |- ( ( 0 x. 1 ) + 1 ) = ( 0 + 1 ) |
173 | 172 57 | eqtri | |- ( ( 0 x. 1 ) + 1 ) = 1 |
174 | 11 3 14 148 14 171 173 | decrmanc | |- ( ( ; ; 4 9 0 x. 1 ) + 1 ) = ; ; 4 9 1 |
175 | 5 14 21 14 1 130 12 14 11 168 174 | decma2c | |- ( ( ; ; 4 9 0 x. N ) + ; ; ; 2 3 1 1 ) = ; ; ; ; ; ; 1 9 6 2 8 0 1 |
176 | 15 | nn0cni | |- ; 1 4 e. CC |
177 | 176 | addid1i | |- ( ; 1 4 + 0 ) = ; 1 4 |
178 | 5nn0 | |- 5 e. NN0 |
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179 | 178 40 | deccl | |- ; 5 6 e. NN0 |
180 | 179 3 | deccl | |- ; ; 5 6 0 e. NN0 |
181 | eqid | |- ; ; 5 6 0 = ; ; 5 6 0 |
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182 | 179 | nn0cni | |- ; 5 6 e. CC |
183 | 182 | addid2i | |- ( 0 + ; 5 6 ) = ; 5 6 |
184 | 3 14 179 3 55 181 183 54 | decadd | |- ( 1 + ; ; 5 6 0 ) = ; ; 5 6 1 |
185 | 182 | addid1i | |- ( ; 5 6 + 0 ) = ; 5 6 |
186 | 5cn | |- 5 e. CC |
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187 | 186 | addid1i | |- ( 5 + 0 ) = 5 |
188 | 187 178 | eqeltri | |- ( 5 + 0 ) e. NN0 |
189 | 53 | mulid1i | |- ( 1 x. 1 ) = 1 |
190 | 169 187 | oveq12i | |- ( ( 4 x. 1 ) + ( 5 + 0 ) ) = ( 4 + 5 ) |
191 | 5p4e9 | |- ( 5 + 4 ) = 9 |
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192 | 186 59 191 | addcomli | |- ( 4 + 5 ) = 9 |
193 | 190 192 | eqtri | |- ( ( 4 x. 1 ) + ( 5 + 0 ) ) = 9 |
194 | 14 2 188 44 14 189 193 | decrmanc | |- ( ( ; 1 4 x. 1 ) + ( 5 + 0 ) ) = ; 1 9 |
195 | 85 | oveq1i | |- ( ( 0 x. 1 ) + 6 ) = ( 0 + 6 ) |
196 | 195 76 77 | 3eqtri | |- ( ( 0 x. 1 ) + 6 ) = ; 0 6 |
197 | 15 3 178 40 43 185 14 40 3 194 196 | decmac | |- ( ( ; ; 1 4 0 x. 1 ) + ( ; 5 6 + 0 ) ) = ; ; 1 9 6 |
198 | 189 | oveq1i | |- ( ( 1 x. 1 ) + 1 ) = ( 1 + 1 ) |
199 | 18 | dec0h | |- 2 = ; 0 2 |
200 | 198 112 199 | 3eqtri | |- ( ( 1 x. 1 ) + 1 ) = ; 0 2 |
201 | 16 14 179 14 39 184 14 18 3 197 200 | decmac | |- ( ( ; ; ; 1 4 0 1 x. 1 ) + ( 1 + ; ; 5 6 0 ) ) = ; ; ; 1 9 6 2 |
202 | 59 | mulid2i | |- ( 1 x. 4 ) = 4 |
203 | 202 | oveq1i | |- ( ( 1 x. 4 ) + 1 ) = ( 4 + 1 ) |
204 | 4p1e5 | |- ( 4 + 1 ) = 5 |
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205 | 203 204 | eqtri | |- ( ( 1 x. 4 ) + 1 ) = 5 |
206 | 2 14 2 44 40 14 205 149 | decmul1c | |- ( ; 1 4 x. 4 ) = ; 5 6 |
207 | 75 | addid1i | |- ( 6 + 0 ) = 6 |
208 | 178 40 3 206 207 | decaddi | |- ( ( ; 1 4 x. 4 ) + 0 ) = ; 5 6 |
209 | 0cn | |- 0 e. CC |
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210 | 59 | mul01i | |- ( 4 x. 0 ) = 0 |
211 | 210 81 | eqtri | |- ( 4 x. 0 ) = ; 0 0 |
212 | 59 209 211 | mulcomli | |- ( 0 x. 4 ) = ; 0 0 |
213 | 2 15 3 43 3 3 208 212 | decmul1c | |- ( ; ; 1 4 0 x. 4 ) = ; ; 5 6 0 |
214 | 202 | oveq1i | |- ( ( 1 x. 4 ) + 4 ) = ( 4 + 4 ) |
215 | 4p4e8 | |- ( 4 + 4 ) = 8 |
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216 | 214 215 | eqtri | |- ( ( 1 x. 4 ) + 4 ) = 8 |
217 | 16 14 2 39 2 213 216 | decrmanc | |- ( ( ; ; ; 1 4 0 1 x. 4 ) + 4 ) = ; ; ; 5 6 0 8 |
218 | 14 2 14 2 44 177 17 94 180 201 217 | decma2c | |- ( ( ; ; ; 1 4 0 1 x. ; 1 4 ) + ( ; 1 4 + 0 ) ) = ; ; ; ; 1 9 6 2 8 |
219 | 17 | nn0cni | |- ; ; ; 1 4 0 1 e. CC |
220 | 219 | mul01i | |- ( ; ; ; 1 4 0 1 x. 0 ) = 0 |
221 | 220 | oveq1i | |- ( ( ; ; ; 1 4 0 1 x. 0 ) + 0 ) = ( 0 + 0 ) |
222 | 221 47 81 | 3eqtri | |- ( ( ; ; ; 1 4 0 1 x. 0 ) + 0 ) = ; 0 0 |
223 | 15 3 15 3 43 43 17 3 3 218 222 | decma2c | |- ( ( ; ; ; 1 4 0 1 x. ; ; 1 4 0 ) + ; ; 1 4 0 ) = ; ; ; ; ; 1 9 6 2 8 0 |
224 | 219 | mulid1i | |- ( ; ; ; 1 4 0 1 x. 1 ) = ; ; ; 1 4 0 1 |
225 | 17 16 14 39 14 16 223 224 | decmul2c | |- ( ; ; ; 1 4 0 1 x. ; ; ; 1 4 0 1 ) = ; ; ; ; ; ; 1 9 6 2 8 0 1 |
226 | 175 225 | eqtr4i | |- ( ( ; ; 4 9 0 x. N ) + ; ; ; 2 3 1 1 ) = ( ; ; ; 1 4 0 1 x. ; ; ; 1 4 0 1 ) |
227 | 8 9 5 13 17 22 125 129 226 | mod2xi | |- ( ( 2 ^ ; ; 8 0 0 ) mod N ) = ( ; ; ; 2 3 1 1 mod N ) |