is 2 1152517 - 1
has 346943 decimal digits
takes 0.034 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L0EBBFB03173A3369double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26725.781868.6567%500000100000000.04374.4280%25.825570.0446%
Target2600.133365.0000%5000260000.00030.7712%0.133565.2699%
Difference+7+25.6485+3.6567%+495000+9974000+0.0435+3.6568%+25.6920+4.7747%

Known prime factors (1 factor, 86.2 bits, 0.00748120% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1152517902470188729375738029265592686.22239152142169242437987
39152142169242437987
2014-07-2913915214216924243798723,448,5119.167e+101.712e+11

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-16Jocelyn Larouchev4_computers10001000---4.29764e-5--0.005%
2002-03-24Jocelyn Larouchev4_computers40004000---0.000--0.049%
2002-06-02ANONYMOUSv4_computers500001000000---0.004--1.743%
2012-02-02markrtiny50000010000000---0.044--4.428%
2016-03-17alpertronManual testing3000001000000012---0.036--4.140%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-07-12ANONYMOUSv4_computers21256--0.008--
2001-11-14ANONYMOUSv4_computers21257--0.017--
2003-05-04ANONYMOUSv4_computers21258--0.033--
2022-03-07LordJuliusManual testing258260--0.100--
2009-02-15Sturle Sundekrebs.ifi260261--0.133--
2011-05-09XyzzyManual testing261262--0.267--
2012-10-07dbaughManual testing262263--0.852--


ECM factoring results:
Total ECM effort:17.750 GHz-days
Estimated T-Level:25.658
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002809.92
50000500000010.035
25000025000000447.795


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1997-01-01Larry Deem0EBBFB03173A33690.034
2002-07-14ANONYMOUSv4_computers0EBBFB03173A33690.034


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-29Oliver KruseGTX-0
90247018872937573802926559
55A8BCD4A23280__no
2017-10-17Oliver KruseThreadripper
90247018872937573802926559
55A8BCD4A23280__no
2018-01-02ATHec2-1xf
90247018872937573802926559
55A8BCD4A23280__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 10000000 (P-1 stage 2)
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 300000 (P-1 stage 1)
B1 = 50000, B2 = 1000000 (P-1 stage 2)
B1 = 50000 (P-1 stage 1)
B1 = 4000 (P-1 stage 1)
B1 = 1000 (P-1 stage 1)
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1010
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1016
1017
1018
1019
1020
TF factor-bounds graph:
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262
261
260
258
257
256
this exponent TF target: 60
TF double-checked to: 67.7
ECM T-Level=25.66 ~= 69-bit
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Last modified: 2023-03-25T13:08:14+00:00