is 2 1437187 - 1
has 432637 decimal digits
takes 0.055 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L6BD0B8923A802D20double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.675168.6567%500000150000000.07144.9228%20.746570.1997%1.5430%
PrimeNet2560.006762.5000%65001100000.00072.7763%0.007463.5411%1.0411%
GPU722600.106965.0000%6000900000.00061.3545%0.107565.4741%0.4741%
Difference+7+20.5682+3.6567%+494000+14910000+0.0708+3.5683%+20.6390+4.7256%+4.7256%

Known prime factors (1 factor, 67.0 bits, 0.00466069% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14371871458273990059570827272166.98350733620261649
32 × 13 × 79 × 5488869443
2009-09-2079548886944320.02016.55630.922

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers15000243750---0.002--0.837%
2016-03-17T19:14:19alpertronManual testing5000001500000012---0.071--4.923%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-10-13T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-07-21T00:00:00ANONYMOUSv4_computers21258--0.027--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.394 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000299 / 1002.9904.954%
2550000299 / 2801.06834.309%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.394 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100014.5770.000%
25500001.64419.326%
302500000.14086.905%
3510000000.01099.023%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000024911.77
250000350000005013.63


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1997-11-25T00:00:00ANONYMOUSv4_computers6BD0B8923A802D200.055
1997-11-29T00:00:00ANONYMOUSv4_computers6BD0B8923A802D200.055
1997-12-04T00:00:00ANONYMOUSv4_computers6BD0B8923A802D200.055
1997-12-21T00:00:00ANONYMOUSv4_computers6BD0B8923A802D200.055
1998-02-01T00:00:00ANONYMOUSv4_computers6BD0B8923A802D200.055


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T23:16:52Oliver KruseGTX-2
145827399005957082727
061F66B1D65F92__no
2017-10-27T03:14:42kkmrkkblmbrbkc4.xlarge
145827399005957082727
061F66B1D65F92__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 15000, B2 = 243750 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
258
257
250
260
270
280
290
2100
Last modified: 2021-09-29T12:09:28+00:00