A112430 Carmichael numbers equal to the product of 7 primes.

5394826801, 6295936465, 12452890681, 13577445505, 15182481601, 20064165121, 22541365441, 24673060945, 26242929505, 26602340401, 27405110161, 28553256865, 33203881585, 38059298641, 39696166081, 40460634865

Offset: 1

Author

Shyam Sunder Gupta, Dec 11 2005

Keywords

• easy
• nonn

Examples

			a(1) = 5394826801 = 7*13*17*23*31*67*73.
		

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A002997, A087788, A141711, A074379, A112428, A112429, A112431, A112432, A006931.

Programs

PARI

is(n)={bigomega(n)==7&&is_A002997(n)} \\ M. F. Hasler, Apr 14 2015