is 2 237379 - 1
has 71459 decimal digits
takes 0.001 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LB61347E41C316341double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual267125.175073.1343 %10000000020000000001.655812.4837 %126.830876.4882 %
Target2440.000059.0909 %45005000000.00039.8839 %0.000363.1343 %
Difference+23+125.1750+14.0434 %+99995500+1999500000+1.6556+2.5997%+126.8306+13.3538 %

Known prime factors (1 factor, 99.0 bits, 0.04169073% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2373796186529142459632678361860305533098.9651303091078498863142561444
22 × 31 × 2731 × 37837229 × 101697918169
2019-05-06378372291016979181693.643e+1145.37284.198

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2000-10-07ANONYMOUSv4_computers1000004000000--0.00322.407%
2001-06-09ANONYMOUSv4_computers10000010000000--0.00524.817%
2002-06-02ANONYMOUSv4_computers32768327680012--0.00220.625%
2002-08-03ANONYMOUSv4_computers65536655360012--0.00323.243%
2003-02-24ANONYMOUSv4_computers1310721310720030--0.00725.816%
2003-10-31ANONYMOUSv4_computers2621442621440012--0.01428.337%
2011-01-31JossManual testing20000002000000--0.01620.419%
2011-07-24JossManual testing21440332144033--0.01720.627%
2012-02-26JossManual testing26800412680041--0.02221.296%
2013-10-11David Campeaui5-2500k27000007830000012--0.05532.754%
2014-12-15Denial140i5-4670k1000000025000000012--0.18836.414%
2016-05-13NumberwangManual testing265466350---8.312%
2019-04-07alexhome100000000200000000012--1.65642.351%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-11-17ANONYMOUSv4_computers2522530.003
2000-04-19ANONYMOUSv4_computers212540.010
2022-03-07LordJuliusManual testing254255
2001-02-11ANONYMOUSv4_computers212560.040
2002-04-14ANONYMOUSv4_computers212570.081
2016-02-23Mark RoseManual testing2572580.081
2009-01-01Sturle Sundefizir.ifi2582590.162
2009-01-25Sturle Sundekorsmo.ifi2592600.324
2013-07-20lycornasteroid2602610.647
2015-07-22snme2pm1Manual testing2612621.294
2016-01-12Gordon SpenceManual testing26226412.41
2018-03-09Gordon SpenceManual testing26426515.74


ECM factoring results:
Total ECM effort:16.757 GHz-days
Estimated T-Level:29.327
DigitsB1CompleteFacMiss
201100057.6780.000%
25500008.2640.026%
302500000.86542.091%
3510000000.07193.154%
4030000000.00599.528%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002801.493
2500002500000035110.34
250000250000001654.924


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-09-16ANONYMOUSv4_computersB61347E41C3163410.001


PRP results:
dateuseridcompidcofactorsres64
2019-05-06Niels_Mache_NextcloudSuperDry3
618652914245963267836186030553
4763256C2DED4AD7
2019-05-07kkmrkkblmbrbkc5.large
618652914245963267836186030553
4763256C2DED4AD7


CERT results:
No CERT results for M237379


P-1 factor-bounds graph:
B1 = 100000000, B2 = 2000000000 (P-1 stage 2)
B1 = 100000000 (P-1 stage 1)
B1 = 10000000, B2 = 250000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 2700000, B2 = 78300000 (P-1 stage 2)
B1 = 2700000 (P-1 stage 1)
B1 = 2680041 (P-1 stage 1)
B1 = 2144033 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 262144, B2 = 26214400 (P-1 stage 2)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 100000, B2 = 10000000 (P-1 stage 2)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 100000, B2 = 4000000 (P-1 stage 2)
B1 = 262144 (P-1 stage 1)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 65536 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
B1 = 2654, B2 = 66350 (P-1 stage 2)
B1 = 2654 (P-1 stage 1)
102
103
104
105
106
107
108
102
103
104
105
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107
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109
1010
1011
1012
TF factor-bounds graph:
265
264
262
261
260
259
258
257
256
255
254
253
this exponent TF target: 44
TF double-checked to: 67
ECM T-Level=29.33 ~= 81-bit
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2100
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Last modified: 2024-03-13T02:15:48+00:00