The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A224906

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A224906

Prime numbers p such that 10^(j-1) < p < 10^j and p + 10^(j+k) are also prime numbers for k = 0 to 4.
(history; published version)

#17 by Alois P. Heinz at Thu Jan 30 06:42:22 EST 2020

STATUS

proposed

approved

#16 by Michel Marcus at Thu Jan 30 06:09:10 EST 2020

STATUS

editing

proposed

#15 by Michel Marcus at Thu Jan 30 06:08:59 EST 2020

PROG

(PFGW & SCRIPTIFY, ) the file prem.txt with the 60000000 first primes

STATUS

proposed

editing

Discussion

Thu Jan 30

06:09

Michel Marcus: I guess this should do

#14 by Jon E. Schoenfield at Wed Jan 29 23:24:25 EST 2020

STATUS

editing

proposed

#13 by Jon E. Schoenfield at Wed Jan 29 23:23:59 EST 2020

PROG

PFGW & SCRIPTIFY , , the file prem.txt with the 60000000 first primes

STATUS

approved

editing

Discussion

Wed Jan 29

23:24

Jon E. Schoenfield: Shouldn't the Prog section begin with something(?) in parentheses identifying the language?

#12 by T. D. Noe at Thu Jul 25 13:33:55 EDT 2013

STATUS

editing

approved

#11 by T. D. Noe at Thu Jul 25 13:33:50 EDT 2013

COMMENTS

Only 656 primes have this property on in the 60 000 000 first 60000000 primes.

STATUS

approved

editing

#10 by T. D. Noe at Thu Jul 25 13:32:55 EDT 2013

STATUS

editing

approved

#9 by T. D. Noe at Thu Jul 25 13:32:50 EDT 2013

NAME

prime Prime numbers p such that 10^(j-1) < p < 10^j and p + 10^(j+k) are also prime numbers for k = 0 to 4.

DATA

37957, 1115239, 2757649, 2884279, 3125779, 3169459, 3384583, 3405037, 4237603, 4746139, 4769239, 4861261, 5074831, 5080081, 5194951, 5295877, 5681899, 5980981, 6110593, 6330043, 7025101, 7214773, 7233883, 8010589, 8068969, 8323153, 8462131, 8653651, 9460723, 10087459, 10227991, 11391097

COMMENTS

656 primes have this property on the 60 000 000 first primes

EXAMPLE

37957, 137957, 1037957, 10037957, 100037957, 1000037957 are all prime numbers , . Hence, a(1) = 37957 as it is the smallest prime with this property.

CROSSREFS

Cf. A124001.

STATUS

proposed

editing

#8 by Pierre CAMI at Thu Jul 25 05:53:15 EDT 2013

STATUS

editing

proposed