is 2 197507 - 1
has 59456 decimal digits
takes 0.001 GHz-days to do one PRP test
Last-known PrimeNet details:
Assigned as ecm on 2022-08-08, 0.0% done, ETC 2022-08-09
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actualunknown10000000020000000001.360749.5383%1.360749.5383%49.5383%
PrimeNet2400.000055.0000%2200500000.000012.6202%0.000060.6791%5.6791%
GPU722440.000059.0909%3600800000.00018.8469%0.000162.7101%3.6192%
Difference-440.0000-59.0909%+99996400+1999920000+1.3607+40.6914%+1.3607-13.1718%-13.1718%

Known prime factors (2 factors, 162.4 bits, 0.08224935% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1975071954113723485570231857.439494694801573
3 × 72 × 89 × 139 × 272029
2014-04-231392720290.18259.997e-50.0002
1975074081652953675054381001811077737732105.009103329323863839114082078384
24 × 17 × 307833013273 × 1234069133939
2022-06-0930783301327312340691339396.798e+112,395.64,188.8

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
197507797601405128183621218308501590621639989074286867149162.448
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2017-09-18T14:01:26kkmrkkblmbrbkManual testing100000000200000000012-
skipped known factor: 195411372348557023
--1.361--42.021%


Trial Factoring results:
No TF results for M197507


ECM factoring results:

Old Calculation Method

Total ECM effort:12.266 GHz-days
Estimated T-Level:28.445
DigitsB1CurvesCompleteFacMiss
2011000722 / 1007.2200.071%
2550000722 / 2802.5797.553%
30250000441 / 6400.68950.178%

New Calculation Method

Total ECM effort:12.266 GHz-days
Estimated T-Level:28.445
DigitsB1CompleteFacMiss
201100051.2800.000%
25500007.2550.071%
302500000.75447.032%
3510000000.06294.032%
4030000000.00499.591%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002811.371
250000250000003979.69
2500002500000020.049
2500003125000070.185
25000033750000140.381
2500003600000070.196
2500003725000070.198
2500003850000070.201


Lucas-Lehmer results:
No L-L results for M197507


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-22T02:03:50Oliver KruseDoppelherz
195411372348557023
8A53C87E04EBF1__no
2017-09-22T10:02:22Oliver KruseManual testing
195411372348557023
8A53C87E04EBF1__no
2017-10-12T06:16:37kkmrkkblmbrbkc4.xlarge8A53C87E04EBF1__no
2020-04-17T19:07:25Oliver KruseAddPrpType5
195411372348557023
2C9EC79B16C9E3__no
2022-06-09T10:39:12SRJ2877LTOS
195411372348557023
40816529536750543810018110777377
2C9EC79B16C9E3DFno
2022-06-09T18:55:46LordJuliusWhiteBox
195411372348557023
40816529536750543810018110777377
2C9EC79B16C9E3DFno


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:
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2110
Last modified: 2022-08-09T03:25:05+00:00