A341804 Primes p dividing (the product of the primes less than p)-1.

2, 5, 11, 176078293

Offset

1,1

Comments

The initial term 2 is included because the empty product minus 1 (which gives zero) is divisible by 2.

Links

Table of n, a(n) for n=1..4.

Example

The prime 11 is included because 2*3*5*7-1 is divisible by 11. Therefore, the last factor of the product, namely 7, is in A341812.

Prog

(PARI) t=1; forprime(p=2, , ((t-1)%p==0)&&print1(p, ", "); t*=p)

Crossrefs

Cf. A058233, A066735, A341805, A341812.

Sequence in context: A101828 A071293 A234572 * A109623 A317406 A286466

Adjacent sequences: A341801 A341802 A341803 * A341805 A341806 A341807

Keyword

nonn,hard,more

Author

Jeppe Stig Nielsen, Feb 20 2021

Status

approved