Migration complete - please let us know if anything isn't working.
This number is a prime.
The generalized repunit (6750651153 - 1)/675064 is prime.
A proof is possible because of the remarkable circumstance that, for b = 5*37*41*89 and p = 27*32+1, both Phi(p,b) and Phi(p-1, b) are prime, where Phi(n, x) is the nth cyclotomic polynomial in x. [Broadhurst]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell