|
| |
|
|
A111021
|
|
Integers n such that 7*10^n+31 is a prime number.
|
|
0
| | |
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable/proven prime - search on "70031".
|
|
|
LINKS
| Makoto Kamada, List of near-repdigit-related prime numbers.
Index entries for primes involving repunits.
|
|
|
EXAMPLE
| n = 11 is a member because: 7*10^11+31 = 7*100000000000+31 = 700000000000+31 = 700000000031, which is a prime
|
|
|
CROSSREFS
| Cf. A049054, A088274, A088275, A095688, A107083, A108049, A108050, A108052, A108054, A110980.
Sequence in context: A196173 A074042 A140478 * A126814 A172391 A037449
Adjacent sequences: A111018 A111019 A111020 * A111022 A111023 A111024
|
|
|
KEYWORD
| more,nonn
|
|
|
AUTHOR
| Julien Peter Benney (jpbenney(AT)ftml.net), Oct 04 2005
|
|
|
EXTENSIONS
| a(8) from Ray Chandler (rayjchandler(AT)sbcglobal.net), Dec 23 2010
|
| |
|
|
