

A057659


Prime numbers whose square is composed of just two different decimal digits.


0




OFFSET

0,1


COMMENTS

Conjectured to be a finite sequence.
No further terms up to Prime[1000000]=15485863 [From Harvey P. Dale, Mar 20 2011]


REFERENCES

Related to the Unsolved problem F24, p. 262, of the UPiNT by R. K. Guy


LINKS

Table of n, a(n) for n=0..5.


EXAMPLE

Example: 81619^2 = 6661661161


MATHEMATICA

Select[Prime[Range[10000]], Count[DigitCount[#^2], 0] ==8&] (* Harvey P. Dale, Mar 20 2011 *)


CROSSREFS

Sequence in context: A086140 A104387 A133761 * A098040 A263880 A082565
Adjacent sequences: A057656 A057657 A057658 * A057660 A057661 A057662


KEYWORD

easy,nonn,base


AUTHOR

Carlos Rivera, Oct 15 2000


STATUS

approved



