is 2 58231 - 1
has 17530 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
Actualunknown60000000030160348665447028,262.060269.2626%28,262.060269.2626%
Target2440.000063.6364%500500000.00002.1308%0.000064.4112%
Difference-440.0000-63.6364%+599999500+301603486604470+28,262.0602+67.1318%+28,262.0601+4.8514%

Known prime factors (3 factors, 243.7 bits, 0.41850615% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
582313843247721.87433
3 × 11
-3114.832e-125.909e-91.050e-8
5823113991221713244504386892270.24512013550955027824
24 × 59 × 149 × 85410867329
2010-05-02149854108673296,062.58.003214.948
58231427121460841110203756822632605740136961948945746151.58136674748917338720248391976147218847088488
23 × 55487 × 407359 × 135048811 × 364530589 × 4119873294323
2023-05-0236453058941198732943232.350e+12386.64721.02

4 Composite Factors:
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-10-07kkmrkkblmbrbkManual testing100000000200000000012-
skipped known factor: 3843247
--0.350--39.774%
2023-05-02JacobZPM1Server60000000030160348665447046151.58128,2620.00056,52469.263%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-05-05ATHcolab-Pp215000000150000000027--0.276


Trial Factoring results:
No TF results for M58231


ECM factoring results:
Total ECM effort:26.525 GHz-days
Estimated T-Level:32.211
DigitsB1CompleteFacMiss
2011000141.1820.000%
255000025.5470.000%
302500003.6762.531%
3510000000.44264.263%
4030000000.04695.510%
45110000000.00499.583%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002730.338
250000250000005853.619
10000001000000003899.63
100000077300000010.079
300000025730662525012.86


Lucas-Lehmer results:
No L-L results for M58231


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21Oliver KruseOliver-PC
3843247
1399122171324450438689
3E3D0B95454BF7__no
2017-09-21Oliver KruseManual testing
3843247
1399122171324450438689
3E3D0B95454BF7__no
2017-09-21Oliver KruseManual testing
3843247
1399122171324450438689
3E3D0B95454BF7__no
2017-11-06kkmrkkblmbrbkc4.xlarge
3843247
1399122171324450438689
3E3D0B95454BF7__no
2020-04-17Oliver KruseAddPrpType5
3843247
1399122171324450438689
077DF269754B43__no
2023-05-02JacobZPM1Server
3843247
1399122171324450438689
4271214608411102037568226326057401369619489457
077DF269754B43B1no
2023-05-03ryupritchard
3843247
1399122171324450438689
4271214608411102037568226326057401369619489457
CE26FF499E68A183no
2023-05-03ryupritchard
3843247
1399122171324450438689
4271214608411102037568226326057401369619489457
CE26FF499E68A183no


P-1 factor-bounds graph:
B1 = 600000000, B2 = 301603486654470 (P-1 stage 2)
B1 = 600000000 (P-1 stage 1)
B1 = 100000000, B2 = 2000000000 (P-1 stage 2)
B1 = 100000000 (P-1 stage 1)
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TF factor-bounds graph:
this exponent TF target: 44
TF double-checked to: 67.9
ECM T-Level=32.21 ~= 90-bit
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Last modified: 2023-09-25T11:53:03+00:00