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useless_faq2005-04-12 06:23 pm
e-rubik.livejournal.com) wrote in useless_faq2005-04-12 06:23 pm(no subject)
Среди чисел вида 10^(N-1)+10^(N-2)+...+1 (N>2) есть простые?
e-rubik.livejournal.com) wrote in useless_faq2005-04-12 06:23 pm
no subject