is 253128301-1
has 15,993,213 decimal digits
takes 101.780 GHz-days to do one L-L test
Last-known PrimeNet details:
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2681.121961.7647%----1.121961.7647%-0.5541%
PrimeNet2692.247162.3188%240,00010,000,0002.14385.3325%4.390967.6514%5.3325%
GPU7227336.004264.3836%360,00012,000,0002.76173.9128%38.765968.2964%3.9128%
Difference-5-34.8823-2.6189%-360,000-12,000,000-2.7617-3.9128%-37.6440-6.5317%-6.5317%

Known prime factors (1 factor, 123.4 bits, 0.00023234% known):
Remaining cofactor is PRP status unknown

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
531283011443280416316411699330558801082507074338123.441135829716850573830634124626071
3 × 809 × 971 × 73973 × 214177 × 277993 × 13086571
277,99313,086,5712010-06-072.885e+92.71073.6992

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2010-06-07T20:19:45S485122USB-A625,00017,500,00038123.4414.290203.68.5807.179%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-08T00:00:00ANONYMOUSv4_computers?253--2.25854e-5--
2000-01-12T00:00:00ANONYMOUSv4_computers?253--2.25854e-5--
2000-03-01T00:00:00ANONYMOUSv4_computers?254--4.51708e-5--
2000-05-17T00:00:00ANONYMOUSv4_computers?256--0.000--
2001-07-22T00:00:00ANONYMOUSv4_computers?257--0.000--
2002-06-15T00:00:00ANONYMOUSv4_computers?258--0.001--
2004-04-09T00:00:001997rj7v4_computers?260--0.001--
2008-07-27T23:58:00ANONYMOUSManual testing?264--0.037--
2009-02-20T19:31:00S00030pc-1002264265--0.070--
2009-02-22T03:10:00S00030pc-1002265266--0.141--
2010-01-15T18:37:00bzmnora266267--0.281--
2010-01-21T12:33:00kevshawtc4400267268--0.563--


ECM factoring results:
Exponent "53128301" not found


Lucas-Lehmer results:
Exponent "53128301" not found


PRP results:
Exponent "53128301" not found


P-1 factor-bounds graph:
B1 = 625,000, B2 = 17,500,000 (stage 2)
B1 = 625,000 (stage 1)
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TF factor-bounds graph:
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Last modified: 2010-06-07T20:19:45+00:00