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%I #8 Jan 03 2017 02:25:50
%S 1,2,3,11,15,67,209,439,1285,4393,11513,31037,133361,181411,225209,
%T 637337,637339,7351279,10253001,10553551,339144639,416538907,
%U 639770919,4631809783
%N Numbers n such that prime(n) == n (mod phi(n)).
%C a(25) > 10^12. - _Donovan Johnson_, Mar 14 2010
%e p(3) = 5 is congruent to 3 mod phi(2) = 2, so 3 is a term of the sequence.
%t Select[ Range[ 1, 10^6 ], Mod[ #, EulerPhi[ # ] ] == Mod[ Prime[ # ], EulerPhi[ # ] ] & ]
%K nonn
%O 1,2
%A _Joseph L. Pe_, Jan 11 2002
%E a(18)-a(24) from _Donovan Johnson_, Mar 14 2010
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