A074978 Integers k such that prime(prime(k)) ends with k.

6447, 529271, 569513, 996733, 53172153, 837071903, 53552588203, 445839739269, 6130987583999, 2741062674507191

Offset

1,1

Links

Table of n, a(n) for n=1..10.

Example

prime(prime(6447)) = 806447, prime(prime(529271))=138529271, prime(prime(569513))=150569513, prime(prime(996733))=283996733. Next (if any) k > 6000000.
prime(prime(53172153)) = 23953172153. prime(prime(837071903)) = 489837071903. prime(prime(53552588203)) = 43853552588203. - Chai Wah Wu, Apr 05 2021
prime(prime(445839739269)) = 424445839739269, prime(prime(6130987583999)) = 6926130987583999. - Chai Wah Wu, Apr 13 2021
prime(prime(2741062674507191)) = 4382741062674507191. - Keiichi Motoi, Mar 30 2026

Crossrefs

Cf. A046883 (prime(k) ends with k).

Sequence in context: A294855 A025040 A236092 * A105377 A248998 A256090

Adjacent sequences: A074975 A074976 A074977 * A074979 A074980 A074981

Keyword

nonn,base,more

Author

Zak Seidov, Oct 06 2002

Extensions

a(5)-a(7) from Chai Wah Wu, Apr 05 2021

a(8)-a(9) from Chai Wah Wu, Apr 13 2021

a(10) from Keiichi Motoi, Mar 30 2026

Status

approved