A050774 Iterated procedure 'composite k added to sum of its prime factors reaches a prime' yields 7 skipped primes.

39, 40, 58, 78, 205, 272, 330, 341, 357, 437, 475, 476, 520, 533, 551, 616, 738, 833, 1105, 1184, 1274, 1984, 2262, 2312, 2652, 2964, 3008, 3010, 3198, 3444, 3776, 4386, 5530, 5831, 6020, 6204, 6360, 6768, 7056, 7380, 7420, 7930, 8322, 8835, 8844, 8991

Offset: 1

Author

Patrick De Geest, Sep 15 1999

Keywords

• nonn

Examples

			a(1)=39 + (3+13) = 55 + (5+11) = ending prime 71. Between 39 and 71 one finds 7 primes 41, 43, 47, 53, 59, 61 and 67.
		

Crossrefs

Cf. A050703, A050710.

Extensions

Offset corrected by Sean A. Irvine, Aug 18 2021