Top P-1 factors of Mersenne numbers

Top P-1 factors of all time for C. Karstens

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#UserExponentFactorBits*Date
1C. Karstens576337611671337963160507022026025783.7892011-12-20 09:06:00
2C. Karstens6072477782444888196906956348411179.4482011-12-01 00:49:00