In mathematics, RSA-280 is one of the RSA numbers, large semiprimes that are part of the RSA Factoring Challenge. RSA-280 has a length of 280 decimal digits and has not been factored so far.

RSA-280 = 1790707753365795418841729699379193276395981524363782327873718589639655966058 5783742549640396449103593468573113599487089842785784500698716853446786525536 5503525160280656363736307175332772875499505341538927978510751699922197178159 7724733184279534477239566789173532366357270583106789