is 2 8037151 - 1
has 2419424 decimal digits
takes 2.099 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L10BC2FEB3500D229double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272118.989168.0556%3000000453296025094.578810.4521%213.568071.3944%
Target2673.697165.6716%5500012000000.04442.5687%3.741566.5534%
Difference+5+115.2921+2.3839%+2945000+4531760250+94.5344+7.8834%+209.8265+4.8410%

Known prime factors (1 factor, 127.6 bits, 0.00158748% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
803715125578343044837794744903060230185262396139127.58815912568424332076593374356304980
22 × 5 × 13 × 23 × 163 × 3617 × 8039 × 56711 × 1365577 × 7249657
2022-11-27136557772496572.234e+100.63841.0522

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-07-14ANONYMOUSv4_computers45000731250---0.031--1.114%
2002-11-16ANONYMOUSv4_computers45000731250---0.031--1.114%
2002-12-16ANONYMOUSv4_computers45000731250---0.031--1.114%
2012-10-05NesowaEPC1000001950000---0.076--1.778%
2020-11-14Dylan DelgadoManual testing5000001600000012---0.509--3.772%
2022-11-26linamentcolab29999002999900---1.136--2.817%
2022-11-27linamentU2K3000000453296025039127.58894.584.197189.210.452%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-01-17ANONYMOUSv4_computers21262--0.076--
1999-02-07Phillip Remakerv4_computers21263--0.199--
2013-08-25David CampeauManual testing263264--0.244--
2013-12-24David CampeauManual testing264265--0.465--
2015-04-24snme2pm1Manual testing265266--0.930--
2015-11-18snme2pm1Manual testing266267--1.860--
2017-09-11Sid & AndyManual testing267268--3.719--
2020-02-07TJAOIManual testing268269--7.438--
2021-03-14-Anonymous-Manual testing269270--14.88--
2021-03-14-Anonymous-Manual testing270271--29.75--
2021-03-14-Anonymous-Manual testing271272--59.51--


ECM factoring results:
Total ECM effort:2.382 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000062.382


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-08-31ANONYMOUSv4_computers10BC2FEB3500D2292.099
2002-07-14ANONYMOUSv4_computers10BC2FEB3500D2292.099
2002-11-16ANONYMOUSv4_computers10BC2FEB3500D2292.099
2002-12-16ANONYMOUSv4_computers10BC2FEB3500D2292.099


PRP results:
dateuseridcompidcofactorsres64PRP
2022-12-03jeriffee5900X_Desktop
255783430448377947449030602301852623961
2C713F1E0AADE184no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 4532960250 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 2999900 (P-1 stage 1)
B1 = 500000, B2 = 16000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 100000, B2 = 1950000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 45000, B2 = 731250 (P-1 stage 2)
B1 = 45000 (P-1 stage 1)
103
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105
106
107
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
272
271
270
269
268
267
266
265
264
263
262
250
260
270
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2100
2110
2120
2130
Last modified: 2022-12-03T03:40:49+00:00