is 2 12037 - 1
has 3624 decimal digits
takes 0.000 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
Actual2672,468.548479.1045%1000000000001221925735127097001,903,855.219340.5533%1,906,323.767787.5783%
Target2440.000268.1818%500800000.00001.3376%0.000268.6074%
Difference+23+2,468.5482+10.9227%+99999999500+122192573512629700+1,903,855.2193+39.2156%+1,906,323.7675+18.9709%

Known prime factors (4 factors, 252.9 bits, 2.10143495% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1203772223516.1403
3
-137.258e-133.171e-105.820e-10
120372022217720.94884
22 × 3 × 7
2008-08-26471.182e-111.191e-92.328e-9
120379182123398105427185696332479.60338141245319038909968
24 × 3 × 149 × 5332948171006559
2008-08-29149533294817100655910,673,37083,090155,190
1203710423375087890580894098109012895272869326342136.2594329722974117546271536973088350615963
13 × 1987 × 5399593 × 529511677 × 58624928115987593
2014-09-07529511677586249281159875931.485e+13913,4091,705,994

11 Composite Factors:
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-09-08kkmrkkblmbrbkManual testing1000000001000000000012-
skipped known factor: 72223
skipped known factor: 2022217
--0.183--12.202%
2023-03-29-Anonymous-T581010000000000012219257351270970065215.8621,903,8554.74793e-63,807,71040.553%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-02-25KinaftHASEE1300000001053000000027--0.215


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-08-26ANONYMOUSManual testing??20.94872.11000e-130.0001.77529e-11


ECM factoring results:
Total ECM effort:60.725 GHz-days
Estimated T-Level:40.585
DigitsB1CompleteFacMiss
20110001,144.9360.000%
2550000280.4250.000%
3025000053.3660.000%
3510000008.2210.027%
4030000001.05134.955%
45110000000.11788.965%
50440000000.01198.870%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
10.00000e+0
5000050000002980.061
250000250000001000.103
50000050000000100.021
10000001000000001,7367.144
2000000200000000200.165
30000003000000004,06950.23
110000002200000000502.999


Lucas-Lehmer results:
No L-L results for M12037


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21Oliver KrusePRP
72223
2022217
918212339810542718569633
104233750878905808940981090128952728693263
3526C26D12B8AC2Eno
2017-09-21Oliver KruseManual testing
72223
2022217
918212339810542718569633
104233750878905808940981090128952728693263
3526C26D12B8AC2Eno
2017-10-02kkmrkkblmbrbkManual testing
72223
2022217
918212339810542718569633
104233750878905808940981090128952728693263
3526C26D12B8AC__no
2017-12-07ATHManual testing
72223
2022217
918212339810542718569633
104233750878905808940981090128952728693263
3526C26D12B8AC__no
2020-04-17Oliver KruseManual testing
72223
2022217
918212339810542718569633
104233750878905808940981090128952728693263
54FA4481D1E0E3__no
2023-05-19-Anonymous-buc_a
72223
2022217
918212339810542718569633
104233750878905808940981090128952728693263
54FA4481D1E0E39Bno


P-1 factor-bounds graph:
B1 = 100000000000, B2 = 122192573512709700 (P-1 stage 2)
B1 = 100000000000 (P-1 stage 1)
B1 = 100000000, B2 = 10000000000 (P-1 stage 2)
B1 = 100000000 (P-1 stage 1)
100
101
102
103
104
105
106
107
108
109
1010
1011
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
1016
1017
1018
TF factor-bounds graph:
2
this exponent TF target: 44
TF double-checked to: 67.8
ECM T-Level=40.58 ~= 118-bit
250
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290
2100
2110
2120
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2140
Last modified: 2023-06-05T21:50:05+00:00