is 2 375643 - 1
has 113080 decimal digits
takes 0.004 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L8ABFA033DE7DCA57double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26779.101571.6418 %100000071210208305.467010.6647 %84.568574.6661 %
Target2440.000056.8182 %65009500000.000812.5221 %0.000862.2255 %
Difference+23+79.1015+14.8236 %+993500+7120070830+5.4662-1.8575 %+84.5677+12.4406 %

Known prime factors (1 factor, 64.0 bits, 0.01703065% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
375643181229650205526357912063.97424122591157765
3 × 5 × 19 × 84640670729
2008-02-2619846406707294.248864.823121.07

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-06-15ANONYMOUSv4_computers32768327680012--0.00321.539%
2002-08-24ANONYMOUSv4_computers65536655360012--0.00624.174%
2024-02-18Denial140i5-840010000007121020830--4.73944.666%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-11-24ANONYMOUSv4_computers2522530.002
2000-04-27ANONYMOUSv4_computers212540.006
2022-03-07LordJuliusManual testing254255
2001-03-17ANONYMOUSv4_computers212560.026
2002-02-03ANONYMOUSv4_computers212570.051
2004-01-18ANONYMOUSv4_computers212580.102


ECM factoring results:
Total ECM effort:10.498 GHz-days
Estimated T-Level:26.432
DigitsB1CompleteFacMiss
201100023.7830.000%
25500003.0174.892%
302500000.28675.100%
3510000000.02297.835%
4030000000.00199.860%


ECM Summary

B1B2factorcurvesGHz-days
10.028
5000050000002782.910
250000250000001447.560


Lucas-Lehmer results:
No L-L results for M375643


PRP results:
dateuseridcompidcofactorsres64
2017-09-23Oliver KruseOllaptop
18122965020552635791
FD19EB26483EBC6C
2017-11-02kkmrkkblmbrbkc4.xlarge
18122965020552635791
FD19EB26483EBC6C
2020-04-18Oliver KruseAddPrpType5
18122965020552635791
F1B0F3E133745CED


CERT results:
No CERT results for M375643


P-1 factor-bounds graph:
B1 = 1000000, B2 = 7121020830 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 65536 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
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102
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106
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101
102
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1010
1011
TF factor-bounds graph:
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257
256
255
254
253
this exponent TF target: 44
TF double-checked to: 67
ECM T-Level=26.43 ~= 71-bit
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Last modified: 2024-03-03T02:29:32+00:00