1,1

a(23) = (23+1579!)/23. - Andrew V. Sutherland (drew(AT)math.mit.edu), Apr 11, 2008.

Smallest mother factorial prime p of order n, i.e. smallest prime of the form (p!+n)/n where p is prime.

For smallest daughter factorial prime p of order n see A139074

For smallest father factorial prime p of order n see A139207

For smallest son factorial prime p of order n see A139206

a = {}; Do[k = 1; While[ ! PrimeQ[(Prime[k]! + n)/n], k++ ]; AppendTo[a, Prime[(Prime[k]! + n)/n]], {n, 1, 8}]; a

Cf. A082672, A089085, A089130, A117141, A007749, A139056, A139057, A139058, A139059, A139060, A139061, A139061, A139062, A139063, A139064, A139065, A139066, A020458, A139068, A137390, A139070, A139071, A139072, A139073, A139074, A139074, A139075, A136019, A136020, A136026, A136027.

Sequence in context: A123170 A091806 A139170 this_sequence A089750 A109591 A143932

Adjacent sequences: A139072 A139073 A139074 this_sequence A139076 A139077 A139078

more,nonn

Artur Jasinski (grafix(AT)csl.pl), Apr 08 2008, Apr 21 2008