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A085149 n!!!!!-1 is prime. 4
3, 4, 6, 7, 8, 12, 13, 14, 27, 28, 33, 35, 44, 50, 62, 64, 74, 88, 114, 140, 142, 242, 248, 262, 270, 284, 395, 473, 582, 600, 634, 707, 805, 882, 907, 1008, 1152, 1243, 1853, 2340, 2410, 2703, 2793, 3033, 3600, 3925, 4124, 4154, 6185, 6367, 7130, 9104, 9992 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

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

Robert Price, Table of n, a(n) for n = 1..63

Ken Davis, Status of Search for Multifactorial Primes.

Ken Davis, Results for n!5-1.

CROSSREFS

Cf. A085157 (quintuple factorials), A085148.

Sequence in context: A285703 A002191 A108348 * A239458 A007370 A044813

Adjacent sequences:  A085146 A085147 A085148 * A085150 A085151 A085152

KEYWORD

hard,nonn

AUTHOR

Hugo Pfoertner, Jun 23 2003

EXTENSIONS

More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 03 2008

a(54)-a(63) from Ken Davis link added to b-file by Robert Price, Sep 23 2012

STATUS

approved

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Last modified June 28 20:39 EDT 2017. Contains 288840 sequences.