is 2 5760121 - 1
has 1733970 decimal digits
takes 0.910 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L751C8A09DE4C4CBAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2675.158665.6716 %345000103500000.20385.1985 %5.362467.4562 %
Target2662.563965.1515 %3600040000000.05772.2756 %2.621665.9445 %
Difference+1+2.5946+0.5201 %+309000+6350000+0.1461+2.9229%+2.7408+1.5117 %

Known prime factors (1 factor, 69.4 bits, 0.00120467% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
57601217736905782630890928412169.39067159229664020
22 × 5 × 13 × 29723 × 8690399
2018-01-1229723869039929.1730.11490.2025

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2000-09-08ANONYMOUSv4_computers25000237500--0.0081.486%
2000-12-07Stephen Woodv4_computers2000020000--0.0050.451%
2011-04-16USAFSSP4_26006500010887506--0.0312.782%
2018-01-12Squeeky_Squirreli5-5250U_1600345000103500001222169.3900.2045.732%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-06-28JCv4_computers212610.027
1998-07-21ANONYMOUSv4_computers212620.053
2009-03-29GrunwalderGIMPManual testing2622630.170
2014-10-28NesowaManual testing2632640.341
2014-10-28lycornManual testing2642650.649
2015-09-08snme2pm1Manual testing2652661.297
2016-07-04Gordon SpenceManual testing2662672.595


ECM factoring results:
Total ECM effort:1.441 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.441


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-09-20garyhv4_computers751C8A09DE4C4CBA0.910
2001-02-25Stephen Woodv4_computers751C8A09DE4C4CBA0.910


PRP results:
dateuseridcompidcofactorsres64
2018-01-15Oliver KruseGTX-0
773690578263089092841
D9FF1623873019F2
2018-04-15kkmrkkblmbrbkc5.large
773690578263089092841
D9FF1623873019F2


CERT results:
No CERT results for M5760121


P-1 factor-bounds graph:
B1 = 345000, B2 = 10350000 (P-1 stage 2)
B1 = 345000 (P-1 stage 1)
B1 = 65000, B2 = 1088750 (P-1 stage 2)
B1 = 65000 (P-1 stage 1)
B1 = 25000, B2 = 237500 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
267
266
265
264
263
262
261
this exponent TF target: 66
TF double-checked to: 67
ECM T-Level=1.15 ~= -13-bit
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00