OFFSET
1,1
COMMENTS
Next term has 657 digits and is too large to include. - David Wasserman, Jul 01 2005
a(9) has 1280 digits: 623 repeats of "9" + 634 repeats of "8" + 12 repeats of "7" + "65544433211". a(10) has 4990 digits: 1855 repeats of "10" + a(9). a(8), a(9), a(10) are verified by PARI ispseudoprime function. - Dmitry Petukhov, Oct 15 2017
EXAMPLE
a(3) = 33211 as 3211 is not a prime but 33211 is.
PROG
(PARI) x=0; n=-1; for(k=1, 9, z=n; while(1, n++; x=x+k*10^n; if(ispseudoprime(x), print(x); break))) \\ Dmitry Petukhov, Oct 15 2017
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Sep 21 2003
STATUS
approved