is 2 183877 - 1
has 55353 decimal digits
takes 0.001 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
Actual267161.596773.1343 %10000000020000000001.360712.2561 %162.957476.4270 %
Target2440.000059.0909 %34003500000.00018.4066 %0.000262.5300 %
Difference+23+161.5967+14.0434 %+99996600+1999650000+1.3606+3.8495%+162.9573+13.8970 %

Known prime factors (2 factors, 138.9 bits, 0.07552040% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1838771088640100971236.664296024
23 × 37003
-8370035.349e-81.353e-52.517e-5
183877582827864253793711676579628337731102.20115848307951886144315944344
23 × 3917 × 357437 × 1414945904869867
2022-02-0235743714149459048698679.237e+11515,433962,686

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2017-06-24kkmrkkblmbrbkManual testing100000000200000000012
skipped known factor: 108864010097
---41.892%


Trial Factoring results:
5758596061626364656667
No TF results for M183877


ECM factoring results:
Total ECM effort:26.859 GHz-days
Estimated T-Level:30.430
DigitsB1CompleteFacMiss
201100066.2120.000%
25500009.7340.006%
302500001.03635.476%
3510000000.08691.756%
4030000000.00699.422%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002811.369
2500002500000046610.79
2500002500000010.024
2500003125000070.184
2500003225000070.187
2500003452364870.192
2500003600000070.195
2500003725000070.198
2500003850000070.201
2500005513357857013.52


Lucas-Lehmer results:
No L-L results for M183877


PRP results:
dateuseridcompidcofactorsres64
2017-09-22Oliver KruseDoppelherz
108864010097
10B742E06B390B74
2017-09-22Oliver KruseManual testing
108864010097
10B742E06B390B74
2017-10-12kkmrkkblmbrbkc4.xlarge
108864010097
10B742E06B390B74
2020-04-17Oliver KruseAddPrpType5
108864010097
375761F8DE9F45B2
2022-02-02SRJ2877LTOS
108864010097
5828278642537937116765796283377
375761F8DE9F45B2
2023-08-24USAFSS6917th_Scty_Sq
108864010097
5828278642537937116765796283377
375761F8DE9F45B2


CERT results:
dateuseridcompid
2022-02-03curtiscwcm201--19l
2023-08-24Ge yong


P-1 factor-bounds graph:
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
ECM T-Level=30.43 ~= 84-bit
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Last modified: 2024-03-13T02:15:48+00:00