is 2 198977 - 1
has 59899 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-LAE7000F4B44B2BAEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual267149.333473.1343 %10000000020000000001.360712.3262 %150.694276.4458 %
Target2440.000059.0909 %36004000000.00028.8578 %0.000262.7146 %
Difference+23+149.3334+14.0434 %+99996400+1999600000+1.3606+3.4683%+150.6940+13.7313 %

Known prime factors (1 factor, 59.9 bits, 0.03009985% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
19897710696013876957535591959.8922687751317227
2687751317227
2008-02-27126877513172270.5319979.091,828.7

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-05-06ANONYMOUSv4_computers10000010000000--0.00424.461%
2002-06-02ANONYMOUSv4_computers32768327680012--0.00120.279%
2002-07-27ANONYMOUSv4_computers65536655360012--0.00322.890%
2003-02-16ANONYMOUSv4_computers1310721310720030--0.00625.458%
2003-10-08ANONYMOUSv4_computers2621442621440012--0.01127.976%
2017-09-30kkmrkkblmbrbkManual testing100000000200000000012---42.035%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-11-17ANONYMOUSv4_computers2522530.003
2000-05-05ANONYMOUSv4_computers212540.012
2022-03-07LordJuliusManual testing254255
2001-01-28ANONYMOUSv4_computers212560.048
2002-04-20ANONYMOUSv4_computers212570.096


ECM factoring results:
Total ECM effort:16.044 GHz-days
Estimated T-Level:29.564
DigitsB1CompleteFacMiss
201100060.1180.000%
25500008.6520.017%
302500000.91340.140%
3510000000.07592.755%
4030000000.00599.497%


ECM Summary

B1B2factorcurvesGHz-days
10.013
5000050000002731.327
250000250000004059.88
2500003225000070.187
25000036000000852.375
25000038500000210.604
25000025426810570.837
25000036753717050.820


Lucas-Lehmer results:
No L-L results for M198977


PRP results:
dateuseridcompidcofactorsres64
2017-09-22Oliver KruseOllaptop
1069601387695753559
B4B69D4CD02EA76F
2017-09-22Oliver KruseManual testing
1069601387695753559
B4B69D4CD02EA76F
2017-10-12kkmrkkblmbrbkc4.xlarge
1069601387695753559
B4B69D4CD02EA76F
2020-04-17Oliver KruseAddPrpType5
1069601387695753559
BB0A193E6AF6E2A9
2023-08-24USAFSS6917th_Scty_Sq
1069601387695753559
BB0A193E6AF6E2A9


CERT results:
dateuseridcompid
2023-08-24curtiscwcm302--01l


P-1 factor-bounds graph:
B1 = 100000000, B2 = 2000000000 (P-1 stage 2)
B1 = 100000000 (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 = 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)
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108
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109
1010
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TF factor-bounds graph:
257
256
255
254
253
this exponent TF target: 44
TF double-checked to: 67
ECM T-Level=29.56 ~= 82-bit
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Last modified: 2024-03-13T02:15:48+00:00