Two possible challenges

devarajkandadai · 2013-10-23, 05:41

1) This is with reference to the large prime: Id 116042 in the database pertaining to large primes. Q: Is this Sophie prime also a Mangammal prime?

(for definition see A123239 ).

2) Are there infinitely many Shantha primes? ( see encyclopedia in planetmath.org )

A.K. Devaraj

MattcAnderson · 2013-11-09, 23:30

Hi man,

I admire your contribution to the encyclopedia for integer sequences and to this forum.

To quote

oeis.org/A123239 Primes that do not divide 3^n-2 for any n.

Cheers,

Matt

2013-10-23, 05:41	#1
devarajkandadai May 2004 2²·79 Posts	Two possible challenges 1) This is with reference to the large prime: Id 116042 in the database pertaining to large primes. Q: Is this Sophie prime also a Mangammal prime? (for definition see A123239 ). 2) Are there infinitely many Shantha primes? ( see encyclopedia in planetmath.org ) A.K. Devaraj

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2013-11-09, 23:30	#2
MattcAnderson "Matthew Anderson" Dec 2010 Oregon, USA 2⁴·3·23 Posts	Hi man, I admire your contribution to the encyclopedia for integer sequences and to this forum. To quote oeis.org/A123239 Primes that do not divide 3^n-2 for any n. Cheers, Matt