[seqfan] Re: 7...

[Frank Adams-Watters]

None. One of those seven numbers will always be divisible by 7.

Franklin T. Adams-Watters

-----Original Message-----
From: юрий герасимов <2stepan at rambler.ru>

Dear SeqFans. 

Primes p such that 15p -/+ 2, 15p -/+ 4 and 15p -/+ 8 are
all primes: 7, ... What in the next ( >10^9 ) one? 

P.S. 

Numbers n such that
15n -/+ 2, 15n -/+ 4 and 15n -/+ 8 are all primes: 7, 1071, 1295, 2919, 72751,
... (not in OEIS). 

Primes p such that (15p - 4, 15p - 2, 15p + 2, 15p + 4) is
a prime quadruplet: 7, 13, 139, 1049, 4481, ... (not in OEIS). 

Thanks,
JSG

.

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