is 2 291877 - 1
has 87864 decimal digits
takes 0.002 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual267101.802971.6418%50000500000.00050.3966%101.803471.7543%0.1125%
PrimeNet2400.000052.5000%3000800000.000115.0975%0.000159.6713%7.1713%
GPU722440.000056.8182%55001400000.000111.1988%0.000161.6540%4.8358%
Difference+23+101.8029+14.8236%+44500-90000+0.0004-10.8021%+101.8032+10.1003%+10.1003%

Known prime factors (4 factors, 241.0 bits, 0.08257277% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
291877101305369664811443.20417354120
23 × 5 × 7 × 61979
-8619795.231e-63.353e-56.249e-5
2918772329194057906891547.727399002672
24 × 37 × 673991
2014-03-13376739917.803e-50.00040.0007
291877898149333793840883992066.284153857503981787
701581 × 219301127
2014-09-1570158121930112768.4090.12500.2211
291877168007511303599353948570792683.79728780532776409130207
33 × 198941 × 5358099428401
2020-06-2819894153580994284018,319,6512,892.55,402.3

11 Composite Factors:
exponentprime factorscomposite factordigitsbits*
29187723595986505733636072948954092890.931
29187790987350274187879279376500395391933109.487
2918772091964091385646099517430806711691135114.010
29187717020063039075877169667457402120856899939127.0005
291877391322097012068269852171785814214393743140131.524
291877150895834349688951538348999749109402930692652146150.080
29187721192719560333124700911543322607871810951526019148157.214
29187739643029695816216845158944693720279530403907808250
311
53174.727
29187715286558279675173904832274942574234008468922708932
906942601
59193.284
29187735146568073019788893507291106813343673145753458870
4428962969
60197.807
29187735605360710866785787831436840587263956524249522779
24897794445329943242089
73241.011
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-02-06T16:49:09Lisander ViaeneManual testing5000050000---0.000--0.397%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2014-03-13T11:34:00TJAOIManual testing??47.727151.37925e-50.0042.86506e-5


ECM factoring results:

Old Calculation Method

Total ECM effort:16.843 GHz-days
Estimated T-Level:27.953
DigitsB1CurvesCompleteFacMiss
2011000616 / 1006.1600.205%
2550000616 / 2802.20011.037%
30250000378 / 6400.59155.373%

New Calculation Method

Total ECM effort:16.843 GHz-days
Estimated T-Level:27.953
DigitsB1CompleteFacMiss
201100039.1770.000%
25500005.3470.476%
302500000.54757.862%
3510000000.04495.724%
4030000000.00399.713%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002381.742
250000250000001555.674
2500002500000030.110
250000367500002209.318


Lucas-Lehmer results:
No L-L results for M291877


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-22T13:20:04Oliver KruseOllaptopFFF09432AD575E__?
2017-09-22T20:36:41Oliver KruseManual testingFFF09432AD575E__?
2017-10-12T20:23:28Oliver KruseGTX-2FFF09432AD575E__no
2017-11-06T18:06:53kkmrkkblmbrbkc4.xlarge
10130536966481
232919405790689
89814933379384088399
FFF09432AD575E__no
2020-04-17T22:12:43Oliver KruseAddPrpType5
10130536966481
232919405790689
89814933379384088399
680AA2BFA71941__no
2020-06-30T02:47:27mnd9mnd
10130536966481
232919405790689
89814933379384088399
16800751130359935394857079
680AA2BFA719415Fno
2020-07-01T04:26:27fre_gamesgpu
10130536966481
232919405790689
89814933379384088399
16800751130359935394857079
680AA2BFA719415Fno


P-1 factor-bounds graph:
B1 = 50000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
267
2
240
250
260
270
280
290
2100
Last modified: 2022-04-05T09:13:43+00:00