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.

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

Offset: 1

Author

Pierre CAMI, Jul 25 2013

Keywords

• nonn

Comments

Only 656 primes have this property in the first 60000000 primes.

Examples

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

Links

• Pierre CAMI, Table of n, a(n) for n = 1..656

Crossrefs

Cf. A124001.