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A062308 Largest prime factor of 11^n+1 (A034524). 3
2, 3, 61, 37, 7321, 13421, 1117, 1623931, 6304673, 590077, 212601841, 58367, 20113, 59583967, 55527473, 7537711, 447600088289, 2218331, 3138426605161, 1390636259, 1120648576818041, 3421169496361, 2649263870814793 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Harry J. Smith, Table of n, a(n) for n=0..80

FORMULA

a(n) = A006530(A034524(n)). - Vincenzo Librandi, Jul 12 2016

MATHEMATICA

Table[FactorInteger[11^n + 1][[-1, 1]], {n, 0, 20}] (* Vincenzo Librandi, Jul 12 2016 *)

PROG

(PARI) for(n=0, 22, print(factor(11^n+1)))

(PARI) { for (n=0, 80, f=factor(11^n + 1)~; write("b062308.txt", n, " ", f[1, length(f)]) ) } \\ Harry J. Smith, Aug 04 2009

(MAGMA) [Maximum(PrimeDivisors(11^n+1)): n in [0..40]]; // Vincenzo Librandi, Jul 12 2016

CROSSREFS

Cf. A006530, A034524.

Cf. similar sequences listed in A274903.

Sequence in context: A112098 A144545 A085326 * A072875 A093551 A173915

Adjacent sequences:  A062305 A062306 A062307 * A062309 A062310 A062311

KEYWORD

nonn

AUTHOR

Jason Earls, Jul 12 2001

STATUS

approved

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Last modified October 22 18:02 EDT 2019. Contains 328319 sequences. (Running on oeis4.)