found: Work cat.: 2001042960: 17 lectures on Fermat numbers, 2001.
found: CRC concise encyc. math.(Fermat number: a binomial number of the form: Fn=2²n [n is superscript to the superscript 2] + 1 for n=0, 1, 2 ...; Fermat conjectured that all numbers of this form are primes, this is true for n=0 to 4, however n=5 is divisible by 641 and therefore not prime; it is unknown how many more primes exist)
found: Encyc. dict. math.:p. 1113, under Number theory (Elementary: Fermat numbers)
found: Eisenreich. Mathematik(Fermat['s] number)
found: McGraw-Hill dict. sci. tech.(Fermat numbers)
notfound: Encyc. math;Math. subj. classif.
