This site is supported by donations to The OEIS Foundation.



Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A065584 Smallest prime beginning with exactly n 1's. 17
2, 13, 11, 1117, 11113, 111119, 11111101, 11111117, 111111113, 11111111129, 11111111113, 1111111111139, 11111111111123, 1111111111111013, 1111111111111123, 11111111111111101, 11111111111111119 (list; graph; refs; listen; history; text; internal format)



Largest terms are only probable primes. Some terms of the sequence are also in A004022 (repunit primes) or A056710 (all digits same except last digit). All terms of A004022 are in the current sequence.

According to the Magma Calculator (at http://magma.maths.usyd.edu.au/calc/), all 201 terms in the table (and thus all 17 terms listed above) are, in fact, prime. - Jon E. Schoenfield, Aug 24 2009


M. F. Hasler, Table of n, a(n) for n = 1..201


Cf. A065821, A068103, A068104, A068105.

Cf. A004022 (repunit primes), A056710 (near-repdigit primes).

Sequence in context: A213305 A002591 A037055 * A153651 A229908 A320339

Adjacent sequences:  A065581 A065582 A065583 * A065585 A065586 A065587




Robert G. Wilson v, Nov 28 2001


Corrected by Don Reble, Jan 17 2007



Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 8 04:46 EST 2019. Contains 329853 sequences. (Running on oeis4.)