A085150 Numbers n such that n!!!!!!+1 is prime.

0, 1, 2, 4, 6, 8, 10, 12, 16, 18, 20, 22, 28, 40, 42, 44, 52, 66, 68, 78, 80, 92, 100, 102, 106, 210, 214, 232, 534, 676, 772, 822, 964, 1020, 1184, 1498, 2304, 2348, 7738, 9488, 11250, 12760, 12798, 25336, 27728, 35242, 41730, 46576, 55458, 73908, 94412, 99088

Offset

1,3

Comments

The search for multifactorial primes started by Ray Ballinger

is now continued by a team of volunteers on the website of Ken Davis (see link).

Links

Table of n, a(n) for n=1..52.

Ken Davis, Status of Search for Multifactorial Primes.

Ken Davis, Results for n!6+1.

Crossrefs

Cf. A085158 (sextuple factorials), A051592.

Sequence in context: A097379 A371288 A114871 * A051178 A093891 A213708

Adjacent sequences: A085147 A085148 A085149 * A085151 A085152 A085153

Keyword

hard,nonn

Author

Hugo Pfoertner, Jun 23 2003

Extensions

More terms from Hugo Pfoertner, Aug 17 2004

Corrected and extended by Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 03 2008

Status

approved