is 2 1760557 - 1
has 529981 decimal digits
takes 0.096 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L094B42FC558E229Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.877668.6567%500000150000000.10155.0450%16.979070.2380%1.5813%
PrimeNet2570.010963.1579%80001400000.00122.8057%0.012164.1916%1.0337%
GPU722610.174565.5738%80001200000.00111.4527%0.175666.0739%0.5001%
Difference+6+16.7031+3.0829%+492000+14880000+0.1004+3.5923%+16.8035+4.1641%+4.1641%

Known prime factors (2 factors, 136.5 bits, 0.00775041% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17605572474413551988564731857.78070273599548
22 × 31 × 566722577
-315667225770.02002.42884.5364
17605574810401359772580462347432478.671136615893713540103
3 × 4049 × 11246883486749
2019-08-0440491124688348674952,85748,20190,027

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
176055711902922315125492495685539928187692304143942136.450
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:30:16alpertronManual testing5000001500000012---0.101--5.045%


Trial Factoring results:
No TF results for M1760557


ECM factoring results:

Old Calculation Method

Total ECM effort:17.881 GHz-days
Estimated T-Level:24.643
DigitsB1CurvesCompleteFacMiss
2011000260 / 1002.6007.331%
2550000260 / 2800.92939.446%

New Calculation Method

Total ECM effort:17.881 GHz-days
Estimated T-Level:24.643
DigitsB1CompleteFacMiss
20110008.3870.023%
25500000.75846.859%
302500000.04795.439%
3510000000.00299.786%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025717.68
50000500000030.206


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-09-14T00:00:00ANONYMOUSv4_computers094B42FC558E229D0.096


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T09:16:02Oliver KruseGTX-3
247441355198856473
537306C883219D__no
2017-11-04T02:26:08kkmrkkblmbrbkc4.xlarge
247441355198856473
537306C883219D__no
2019-08-08T15:16:08roemer2201ws-rebentrost-o
247441355198856473
481040135977258046234743
F3CB5598CEA0DF43no
2019-08-09T14:19:25kkmrkkblmbrbkc5.large
247441355198856473
481040135977258046234743
F3CB5598CEA0DF43no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-08-28T11:15:51+00:00