is 2 51382049 - 1
has 15467538 decimal digits
takes 94.129 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2681.160061.7647 %----1.160061.7647 %
Target27337.227964.3836 %340000550000008.81373.7994 %46.041665.7368 %
Difference-5-36.0678-2.6189 %-340000-55000000-8.8137-3.7994 %-44.8816-3.9721 %

Known prime factors (1 factor, 75.8 bits, 0.00014760% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
51382049676380359841708719539272375.840658187414676387
33 × 151 × 1619 × 2003 × 49783
2009-11-26200349783225.220.01220.0135

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-11-26Sturle Sundetrumpkin.ifi2375.8401.8900.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-10-15ANONYMOUSv4_computers212532.34000e-5
2000-02-16ANONYMOUSv4_computers212544.67000e-5
2000-04-19ANONYMOUSv4_computers212560.000
2001-05-13ANONYMOUSv4_computers212570.000
2002-02-17ANONYMOUSv4_computers212580.001
2003-10-14apocalypsev4_computers212600.001
2022-04-05LordJuliusManual testing260263
2008-11-28blackivoryelenatucano2632640.038
2008-11-29Stefan MuthCore_2_Duo2642660.218
2008-11-30Stefan MuthCore_2_Duo2662670.291
2009-04-16Sturle Sundegilia.ifi2672680.582


ECM factoring results:
No ECM results for M51382049


Lucas-Lehmer results:
No L-L results for M51382049


PRP results:
No PRP results for M51382049


CERT results:
No CERT results for M51382049


P-1 factor-bounds graph:
102
103
104
102
103
104
105
TF factor-bounds graph:
268
267
266
264
263
260
258
257
256
254
253
this exponent TF target: 73
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00