is 2 37 - 1
has 12 decimal digits
takes 0.000 GHz-days to do one PRP test
Has been fully factored.
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-
Cofactor is a certified prime

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actualunknown10000001000000000.000117.4424%0.000117.4424%
Target2440.063386.3636%500500000.00000.1915%0.063386.3898%
Difference-44-0.0633-86.3636%+999500+99950000+0.0001+17.2508%-0.0632-68.9474%

Known prime factors (2 factor, 37.0 bits, 100.00000000% known):
Remaining cofactor is a certified-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3722337.8013
3		-134.540e-131.635e-113.000e-11
37
hide decimal representation
616318177
929.199

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2017-02-25axt003Manual testing100000010000000012-
skipped known factor: 223
--9.42552e-5--17.442%


Trial Factoring results:
No TF results for M37


ECM factoring results:
No ECM results for M37


Lucas-Lehmer results:
No L-L results for M37


PRP results:
dateuseridcompidcofactorsres64PRP
2018-01-24Luke_Richardswork-laptopPRP
2018-01-24-p95holder- @bopoh13Lucius_Yorkfield
223
PRP


P-1 factor-bounds graph:
B1 = 1000000, B2 = 100000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
this exponent TF target: 44
TF double-checked to: 67.9
250
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Last modified: 2023-10-02T12:12:48+00:00