View Single Post
Old 2020-05-23, 14:15   #8
paulunderwood's Avatar
Sep 2002
Database er0rr

65008 Posts

Originally Posted by kriesel View Post
That number is composite (not prime) by definition. ba for b>1, a>1, a and b integer, is composite; b is a factor. This may win the prize for most obviously NOT prime.
It also happens to have a superficial relationship to the largest known Mersenne prime, 282589933-1, whose exponent is 20M less.
See also, for the perfect record of predicting large primes,by various means,
The "8" --> "10" in the exponent would be beyond expectation. It would take a day on a GPU you to dismiss this claim, assuming P-1 does not turn up a factor.
paulunderwood is offline   Reply With Quote