A092925 Smallest prime of the form n(n-1)(n-2)...(n-k)-1, or 0 if no such prime exists.

2, 3, 19, 5, 41, 7, 71, 89, 109, 11, 17159, 13, 2729, 239, 271, 17, 5813, 19, 419, 461, 72681839, 23, 599, 19275223967999, 701, 11793599, 811, 29, 929, 31, 415017197290314178559999, 968330879, 1659404761645592211554303999999

Offset

3,1

Comments

Conjecture: No term is zero.

Links

Charles R Greathouse IV, Table of n, a(n) for n = 3..899

Example

a(13) = 13*12*11*10-1 = 17159, as 13-1,13*12-1, 13*12*11-1, are all composite.

Crossrefs

Cf. A092926, A092927, A092928.

Sequence in context: A292991 A139319 A269251 * A082012 A059675 A128353

Adjacent sequences: A092922 A092923 A092924 * A092926 A092927 A092928

Keyword

nonn

Author

Amarnath Murthy, Mar 18 2004

Extensions

More terms from Ray Chandler, Mar 23 2004

a(900) has 1576 digits and is not included in the b-file because of its size. - Charles R Greathouse IV, Feb 15 2011

Status

approved