is 2 1097237 - 1
has 330302 decimal digits
takes 0.033 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LEB5FC63B68955806double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26727.080768.6567 %858000889674786020.866411.8136 %47.947072.3595 %
Target2600.140065.0000 %45001100000.00040.6833 %0.140465.2392 %
Difference+7+26.9407+3.6567 %+853500+8896637860+20.8659+11.1302%+47.8066+7.1203 %

Known prime factors (2 factors, 133.0 bits, 0.01211885% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1097237660782983306933032892065.84130111224070412
22 × 647 × 11634939749
2008-04-02647116349397496.649227.24350.882
10972371616783745638257621992167.13273675229036127
3 × 53 × 463366220353
2017-05-055346336622035327.0811,085.02,026.4

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2024-02-05Mark Roseworktop8580008896747860--21.5919.281%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-07-04ANONYMOUSv4_computers212560.009
2001-12-01ANONYMOUSv4_computers212570.017
2022-04-12LordJuliusManual testing21261
2022-04-12LordJuliusManual testing261262
2022-04-12LordJuliusManual testing262263
2022-04-12LordJuliusManual testing263264


ECM factoring results:
Total ECM effort:17.615 GHz-days
Estimated T-Level:25.656
DigitsB1CompleteFacMiss
201100014.7690.000%
25500001.61619.866%
302500000.13187.697%
3510000000.00999.130%


ECM Summary

B1B2factorcurvesGHz-days
10.028
5000050000002217.769
500005000000592.076
25000025000000447.741


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-03-31ANONYMOUSv4_computersEB5FC63B689558060.033


PRP results:
dateuseridcompidcofactorsres64
2017-09-29Oliver KruseGTX-3
66078298330693303289
161678374563825762199
81A0B1EA0A67E557
2017-09-30alpertronManual testing
161678374563825762199
66078298330693303289
81A0B1EA0A67E557
2017-10-16Oliver KruseThreadripper-PC
66078298330693303289
161678374563825762199
81A0B1EA0A67E557


CERT results:
No CERT results for M1097237


P-1 factor-bounds graph:
B1 = 858000, B2 = 8896747860 (P-1 stage 2)
B1 = 858000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.66 ~= 69-bit
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Last modified: 2024-02-09T03:30:02+00:00