A165697 - OEIS

A165697

a(n) is the smallest prime p such that all the n numbers reversal(p^k), k<n+1 are primes.

2, 37, 3121, 10429, 10282339, 9835884797, 101740496633

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OFFSET

1,1

COMMENTS

By an interesting approach I was able to find a(7). [From Farideh Firoozbakht, Sep 30 2009]

LINKS

EXAMPLE

Both numbers reversal(37)=73 & reversal(37^2)=9631 are primes and 37 is the

smallest prime number with this property so a(2)=37.

CROSSREFS

KEYWORD

base,hard,more,nonn

AUTHOR

EXTENSIONS

a(7) from Farideh Firoozbakht, Sep 30 2009

STATUS

approved