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 A178406 Numbers n such that 10^n - 41 is prime. 0
 2, 6, 8, 12, 14, 47, 88, 130, 414, 1388, 1932, 4106, 4412, 12870, 22956, 23932, 27312, 35316, 37169, 43873, 150029 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The next term, if one exists, is >100000. - Robert Price, Apr 25 2011 a(22) > 2.5*10^5. - Robert Price, Apr 12 2015 LINKS Table of n, a(n) for n=1..21. Makoto Kamada, Near-repdigit numbers of the form AA...AABA. Makoto Kamada, Prime numbers of the form 99...9959. Index entries for primes involving repunits. EXAMPLE 10^6 - 41 = 999959 which is a prime number. MATHEMATICA m=1000; For[n=1, n

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Last modified December 6 03:51 EST 2023. Contains 367595 sequences. (Running on oeis4.)