A234926 Primes which become squares when the digits are rotated once to the left.

61, 601, 619, 6067, 6211, 6547, 6577, 6883, 62131, 63097, 63841, 64579, 66553, 69859, 600577, 600883, 601849, 602689, 604243, 604579, 605953, 609241, 609859, 611833, 616321, 619009, 624601, 627667, 629593, 637699, 644089, 649843, 652417, 654169, 655651

Offset

1,1

Comments

Every term in the sequence begins with the digit 6.

Links

Table of n, a(n) for n=1..35.

Example

The prime 611833 is in the list because 118336 = 344*344.

Prog

(PARI) rotl(a) = my(b, c, d); b=#Str(a); c=floor(a/(10^(b-1))); d=a-c*(10^(b-1)); 10*d+c
s=[]; forprime(n=2, 700000, if(issquare(rotl(n)), s=concat(s, n))); s

Crossrefs

Cf. A234925.

Sequence in context: A303412 A209548 A302898 * A355602 A069595 A235009

Adjacent sequences: A234923 A234924 A234925 * A234927 A234928 A234929

Keyword

nonn,base

Author

Colin Barker, Jan 01 2014

Status

approved