7

This number is a prime.

Just showing those entries submitted by 'Hartley': (Click here to show all)

+ 72 can be written as a sum of squares in 72 + 72 ways. [Hartley]

+ Assuming Goldbach's conjecture, there is no positive number that can be written as the sum of exactly 7 primes in exactly 7 ways. [Hartley]

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell