is 2 37980587 - 1
has 11433296 decimal digits
takes 49.058 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L186395EA9CC50337double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27225.179563.8889 %725000163125002.94844.7887 %28.128065.6182 %
Target27112.587463.3803 %280000450000005.08774.1864 %17.675264.9133 %
Difference+1+12.5921+0.5086 %+445000-28687500-2.1393+0.6023%+10.4528+0.7048 %

Known prime factors (1 factor, 72.4 bits, 0.00019056% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3798058761282000337324177534712272.37680675425497405
3 × 5 × 71 × 61871 × 1224347
2018-05-3161871122434728.3680.23450.2358

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2007-03-20Amperiov4_computers610000610000--1.1422.138%
2018-05-31Architects Cubeda3_bu2725000163125001222272.3762.9675.258%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2006-05-29ANONYMOUSv4_computers212680.787
2013-08-30Carsten KossendeyManual testing2682691.574
2014-04-02Jerry HallettManual testing2692719.444
2018-05-26Architects CubedManual testing27127212.59


ECM factoring results:
No ECM results for M37980587


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2009-07-08curtiscwcm222c-01s186395EA9CC5033750.01
2015-02-24MidknightzLaptop186395EA9CC5033750.01


PRP results:
No PRP results for M37980587


CERT results:
No CERT results for M37980587


P-1 factor-bounds graph:
B1 = 725000, B2 = 16312500 (P-1 stage 2)
B1 = 725000 (P-1 stage 1)
B1 = 610000 (P-1 stage 1)
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104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
272
271
269
268
this exponent TF target: 71
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00