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A110933 Integers n such that 3*10^n+71 is a prime number. 0
4, 7, 16, 19, 190, 227, 235, 283, 319, 1655, 3955, 10666 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "30071".

LINKS

Table of n, a(n) for n=1..12.

Makoto Kamada, List of near-repdigit-related prime numbers.

Index entries for primes involving repunits.

EXAMPLE

n = 7 is a member because: 3*10^7+71 = 3*10000000+71 = 30000000+71 = 30000071, which is prime.

CROSSREFS

Cf. A049054, A088274, A088275, A095688, A107083, A108049, A108050, A108052, A108054.

Sequence in context: A236305 A212062 A101534 * A067398 A054599 A229917

Adjacent sequences:  A110930 A110931 A110932 * A110934 A110935 A110936

KEYWORD

more,nonn

AUTHOR

Julien Peter Benney (jpbenney(AT)ftml.net), Oct 04 2005

EXTENSIONS

a(12) from Ray Chandler, Dec 23 2010

STATUS

approved

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Last modified December 20 23:03 EST 2014. Contains 252290 sequences.