is 2 166063 - 1
has 49990 decimal digits
takes 0.001 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L60883A2C3EE54E48double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual267178.931673.1343 %10000000020000000000.975512.1660 %179.907176.4028 %
Target2440.000059.0909 %30003000000.00017.8010 %0.000162.2822 %
Difference+23+178.9316+14.0434 %+99997000+1999700000+0.9754+4.3650%+179.9070+14.1206 %

Known prime factors (1 factor, 106.3 bits, 0.06400325% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1660639889884637932579370613520960892732106.286297775080479474036077076801
11 × 27070461861770366916097891
2016-11-2311270704618617703669160978917.731e+117.069e+151.320e+16

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-04-29ANONYMOUSv4_computers10000010000000--0.00324.099%
2002-06-02ANONYMOUSv4_computers32768327680012--0.00119.927%
2002-07-27ANONYMOUSv4_computers65536655360012--0.00222.531%
2003-02-09ANONYMOUSv4_computers1310721310720030--0.00425.094%
2003-10-08ANONYMOUSv4_computers2621442621440012--0.00827.608%
2009-01-16axnManual testing500000020000000012--0.07534.987%
2013-07-29alpertronManual testing100000000200000000012--0.97541.708%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-11-17ANONYMOUSv4_computers2522530.004
2000-04-19ANONYMOUSv4_computers212540.014
2022-03-07LordJuliusManual testing254255
2001-01-14ANONYMOUSv4_computers212560.058
2002-06-15ANONYMOUSv4_computers212570.116
2016-02-23Mark RoseManual testing2572580.116
2008-12-31Sturle Sundeherrick.ifi2582590.231
2009-01-25Sturle Sundehoffman.ifi2592600.462
2013-09-02lycornasteroid2602610.925
2015-08-13NRManual testing2612621.850
2016-02-12Gordon SpenceManual testing2622635.911
2016-02-12Gordon SpenceManual testing26326411.82


ECM factoring results:
Total ECM effort:43.132 GHz-days
Estimated T-Level:31.884
DigitsB1CompleteFacMiss
2011000141.0560.000%
255000024.6570.000%
302500003.3573.485%
3510000000.37768.607%
4030000000.03696.500%
45110000000.00399.713%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002780.955
250000250000005879.99
100000010000000045931.98
100000010000000030.209


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2016-06-01MadPooManual testing60883A2C3EE54E480.001


PRP results:
dateuseridcompidcofactorsres64
2017-09-21Oliver KruseOllaptop
98898846379325793706135209608927
A3C4F32A420A8CD0
2017-09-22Oliver KruseManual testing
98898846379325793706135209608927
A3C4F32A420A8CD0
2017-09-22Oliver KruseManual testing
98898846379325793706135209608927
A3C4F32A420A8CD0
2017-11-06kkmrkkblmbrbkc4.xlarge
98898846379325793706135209608927
A3C4F32A420A8CD0
2020-04-17Oliver KruseAddPrpType5
98898846379325793706135209608927
42ACBB90D2E1B27D
2024-02-03Wentao HuangManual testing
98898846379325793706135209608927
42ACBB90D2E1B27D


CERT results:
dateuseridcompid
2024-02-03Naegi Makoto1035G1


P-1 factor-bounds graph:
B1 = 100000000, B2 = 2000000000 (P-1 stage 2)
B1 = 100000000 (P-1 stage 1)
B1 = 5000000, B2 = 200000000 (P-1 stage 2)
B1 = 5000000 (P-1 stage 1)
B1 = 262144, B2 = 26214400 (P-1 stage 2)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 100000, B2 = 10000000 (P-1 stage 2)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 262144 (P-1 stage 1)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 65536 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
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TF factor-bounds graph:
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263
262
261
260
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258
257
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255
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253
this exponent TF target: 44
TF double-checked to: 67
ECM T-Level=31.88 ~= 89-bit
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Last modified: 2024-02-09T03:30:02+00:00