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 A155555 Primes p such that (number of prime digits of p) < (number of prime digits of prime(p)). 2
 11, 19, 31, 41, 59, 61, 67, 71, 101, 103, 107, 109, 131, 137, 139, 149, 151, 181, 191, 199, 211, 241, 269, 281, 307, 311, 331, 349, 367, 389, 401, 409, 419, 439, 449, 457, 461, 463, 467, 479, 491, 499, 503, 509, 521, 569, 587, 599, 601, 613, 619, 641, 643 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Prime digits are 2, 3, 5, 7. LINKS John Cerkan, Table of n, a(n) for n = 1..10000 PROG (PARI) dp(n)=d=digits(n); c=0; for(i=1, #d, if(isprime(d[i]), c+=1)); c forprime(p=1, 500, if(dp(p)

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Last modified May 27 18:57 EDT 2024. Contains 372880 sequences. (Running on oeis4.)