is 2 4970551 - 1
has 1496285 decimal digits
takes 0.689 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L2027922F6184AB19double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272192.399968.0556%7000000897565851099.616211.6195%292.016171.7673%
Target2651.467864.6154%3400056000000.06782.4136%1.535665.4694%
Difference+7+190.9321+3.4402%+6966000+8970058510+99.5484+9.2059%+290.4806+6.2979%

Known prime factors (1 factor, 127.2 bits, 0.00255884% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
497055119389736210368850396126879889473036027939127.18919504614488784895674671560446189
3 × 113 × 127 × 487 × 5279 × 1945261 × 2669873 × 33930077		2022-10-272669873339300773.592e+100.87891.0921

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-08-10ANONYMOUSv4_computers2000020000---0.004--0.152%
2009-12-02markrlounge750001500000---0.031--1.433%
2015-04-24mikrMSI120000043100000---0.700--4.786%
2022-10-26Prism Daymonristaccia7000000897565851039127.18999.61.378199.211.619%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23Mark RoseManual testing21261--0.062--
2009-12-13markroldgamer261262--0.062--
2011-08-27GrunwalderGIMPManual testing21263--0.321--
2016-02-23Mark RoseManual testing262263--0.197--
2014-12-29VictordeHollanderManual testing263264--0.395--
2014-12-29VictordeHollanderManual testing264265--0.752--
2015-07-29snme2pm1Manual testing265266--1.503--
2017-05-28YxinityManual testing266267--3.007--
2018-06-05ramgeisManual testing267268--6.014--
2021-03-08TJAOIManual testing268269--12.03--
2021-04-23-Anonymous-Manual testing269270--24.05--
2021-04-24-Anonymous-Manual testing270271--48.11--
2021-04-26-Anonymous-Manual testing271272--96.22--


ECM factoring results:
Total ECM effort:1.894 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.894


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-05-23ANONYMOUSv4_computers2027922F6184AB190.689
2000-08-31ANONYMOUSv4_computers2027922F6184AB190.689


PRP results:
dateuseridcompidcofactorsres64PRP
2022-11-02Funky Waddlemain
193897362103688503961268798894730360279
54A4A9D7E4DED3C2no


P-1 factor-bounds graph:
B1 = 7000000, B2 = 8975658510 (P-1 stage 2)
B1 = 7000000 (P-1 stage 1)
B1 = 1200000, B2 = 43100000 (P-1 stage 2)
B1 = 1200000 (P-1 stage 1)
B1 = 75000, B2 = 1500000 (P-1 stage 2)
B1 = 75000 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
103
104
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
261
this exponent TF target: 65
TF double-checked to: 67.9
ECM T-Level=1.73 ~= -11-bit
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2023-07-11T14:45:05+00:00