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Iterated procedure 'composite k added to sum of its prime factors reaches a prime' yields 7 skipped primes.
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%I #9 Aug 18 2021 23:46:03

%S 39,40,58,78,205,272,330,341,357,437,475,476,520,533,551,616,738,833,

%T 1105,1184,1274,1984,2262,2312,2652,2964,3008,3010,3198,3444,3776,

%U 4386,5530,5831,6020,6204,6360,6768,7056,7380,7420,7930,8322,8835,8844,8991

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

%e 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.

%Y Cf. A050703, A050710.

%K nonn

%O 1,1

%A _Patrick De Geest_, Sep 15 1999

%E Offset corrected by _Sean A. Irvine_, Aug 18 2021