OFFSET
1,1
COMMENTS
Terms greater than 1000 may correspond to unproven strong pseudoprimes.
PROG
(PARI) is(n)=ispseudoprime(11^n-10^n) \\ Charles R Greathouse IV, Feb 17 2017
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
EXTENSIONS
Two more terms 18199 and 35153 from Jean-Louis Charton, Sep 02 2009
New term 206081 found by Jean-Louis Charton in October 2011
Edited by M. F. Hasler, Sep 16 2013
STATUS
approved