%0 Journal Article %A Carl Pomerance %T Odd perfect numbers are divisible by at least seven distinct primes %J Acta Arithmetica %D 1973 %P 265-300 %V 25 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-25-3-265-300/ %R 10.4064/aa-25-3-265-300 %G en %F 10_4064_aa_25_3_265_300