# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a112444 Showing 1-1 of 1 %I A112444 #6 Nov 10 2019 13:44:43 %S A112444 45593065,68800501,81722145,110851741,192112921,226018585,238018341, %T A112444 250385401,265729465,272479285,321197185,329379505,332633665, %U A112444 353987481,357339745,358466361,413631505,415702105,416392005,417241045,421121701,464790781,476177905,483532105 %N A112444 Pseudoprimes (base-2) equal to the product of 6 primes not necessarily distinct. %H A112444 Amiram Eldar, Table of n, a(n) for n = 1..10000 %e A112444 a(1) = 45593065 = 5*7*17*19*37*109. %t A112444 s={}; Do[If[PrimeOmega[n] == 6 && PowerMod[2, n - 1, n] == 1, AppendTo[s, n]], {n, 1, 10^8}]; s (* _Amiram Eldar_, Nov 10 2019 *) %Y A112444 Intersection of A046306 and A001567. %K A112444 easy,nonn %O A112444 1,1 %A A112444 _Shyam Sunder Gupta_, Dec 11 2005 %E A112444 More terms from _Amiram Eldar_, Nov 10 2019 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE