is 2 1762129 - 1
has 530454 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-L4576EA1FE655997Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.862568.6567%500000150000000.10155.0455%16.964070.2382%1.5814%
PrimeNet2570.010963.1579%80001400000.00122.8061%0.012164.1917%1.0338%
GPU722610.174365.5738%80001200000.00111.4530%0.175466.0740%0.5002%
Difference+6+16.6882+3.0829%+492000+14880000+0.1004+3.5925%+16.7886+4.1642%+4.1642%

Known prime factors (1 factor, 76.7 bits, 0.00435177% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17621291213676480513769548373292476.68434437787486437416
23 × 251 × 17150292572927
2013-05-262511715029257292716,79973,502137,281

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-11T15:53:00Carsten Kossendeyleela950001591250---0.014--2.422%
2016-03-16T12:30:23alpertronManual testing5000001500000012---0.101--5.046%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-25T00:00:00ANONYMOUSv4_computers21258--0.022--
2010-04-20T13:12:00Architects Cubedm1_f2260261--0.087--
2010-12-13T03:32:00GrunwalderGIMPManual testing21263--0.906--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.470 GHz-days
Estimated T-Level:24.536
DigitsB1CurvesCompleteFacMiss
2011000254 / 1002.5407.786%
2550000254 / 2800.90740.302%

New Calculation Method

Total ECM effort:17.470 GHz-days
Estimated T-Level:24.536
DigitsB1CompleteFacMiss
20110008.1940.028%
25500000.74147.686%
302500000.04695.542%
3510000000.00299.791%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000025417.47


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-27T00:00:00ANONYMOUSv4_computers4576EA1FE655997D0.096


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T09:47:14Oliver KruseGTX-3
121367648051376954837329
44BEA0A0211F5D__no
2017-11-04T03:26:53kkmrkkblmbrbkc4.xlarge
121367648051376954837329
44BEA0A0211F5D__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 95000, B2 = 1591250 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-08-14T09:32:28+00:00