35132...77921 (10839-digits)

This number is a prime.

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

99235*1378^3451 + 1 is prime. Note that 99235 and 1378 are both triangular numbers whose reversals are prime, and that 3!+4!+5!+1! is prime. [Earls]