is 2 7895299 - 1
has 2376722 decimal digits
takes 1.807 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L94B314283B2546A7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2687.549466.1765 %10000019000000.06572.8452 %7.615167.1388 %
Target2673.763565.6716 %5500060000000.12572.5615 %3.889266.5509 %
Difference+1+3.7859+0.5048 %+45000-4100000-0.0600+0.2837%+3.7259+0.5879 %

Known prime factors (1 factor, 78.0 bits, 0.00098843% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
78952993106254680721874722588012478.04019671545566050600
23 × 3 × 52 × 73 × 449122044887
2018-09-21734491220448877,753.58,118.715,163

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-06-02ANONYMOUSv4_computers30000112500--0.0111.097%
2012-09-15NesowaWork10000019000006--0.0663.194%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-12-06JCv4_computers212610.019
1998-12-06ANONYMOUSv4_computers212620.039
1998-12-13PHeedev4_computers212630.124
2013-10-05NesowaManual testing2632640.249
2013-12-21David CampeauManual testing2642650.473
2015-06-09VictordeHollanderManual testing2652660.946
2016-09-01Gordon SpenceManual testing2662671.893
2018-07-19ramgeisManual testing2672683.786


ECM factoring results:
Total ECM effort:2.088 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000031.044
50000500000031.044


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-08-16ANONYMOUSv4_computers94B314283B2546A71.807
2003-11-28ANONYMOUSv4_computers94B314283B2546A71.807


PRP results:
dateuseridcompidcofactorsres64
2018-09-21ATHec2-PRPCF
310625468072187472258801
2232B589B070ADCA
2019-11-10NumberwangHallowes
310625468072187472258801
2232B589B070ADCA


CERT results:
No CERT results for M7895299


P-1 factor-bounds graph:
B1 = 100000, B2 = 1900000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 30000, B2 = 112500 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
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TF factor-bounds graph:
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261
this exponent TF target: 67
TF double-checked to: 67
ECM T-Level=1.15 ~= -13-bit
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Last modified: 2024-02-09T03:30:02+00:00