Description: The predicate "is a prime number". A prime number is a positive integer with exactly two positive divisors. (Contributed by Paul Chapman, 22-Jun-2011)
Ref | Expression | ||
---|---|---|---|
Assertion | isprm |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | breq2 | ||
2 | 1 | rabbidv | |
3 | 2 | breq1d | |
4 | df-prm | ||
5 | 3 4 | elrab2 |