mersenneforum.org - View Single Post - ...factorial(n) plus/minus 1 is semiprime

Dylan14 · 2020-09-01, 17:13

This would be the intersection of 078778 (n such that n!+1 is semiprime) and 078781 (n such that n!-1 is semiprime). There is no separate sequence (yet, as far as I can tell).

2020-09-01, 17:13	#2
Dylan14 "Dylan" Mar 2017 2×281 Posts	This would be the intersection of 078778 (n such that n!+1 is semiprime) and 078781 (n such that n!-1 is semiprime). There is no separate sequence (yet, as far as I can tell).