is 2 2944709 - 1
has 886446 decimal digits
takes 0.251 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L3E941E4ACFD1385Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26940.542868.1159%15000000104505841440704.424417.5759%744.967273.7199%
Target2630.542065.0794%1700015000000.01211.9470%0.554165.7593%
Difference+6+40.0008+3.0366%+14983000+104504341440+704.4123+15.6290%+744.4131+7.9606%

Known prime factors (2 factors, 231.0 bits, 0.00784411% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
29447099774218371514639680963233832789.659165962381537779109599
557303 × 1135411 × 262280003
2022-11-06113541126228000373,161,2641.89603.2938
2944709349736297055958092646122375649825976619940943141.327593838469363115494003180578539044056
23 × 3 × 1289 × 4957 × 645083 × 4130977 × 8969647 × 162009889
2022-11-1289696471620098896.273e+102.13602.2528

1 Composite Factors:
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-12-13ANONYMOUSv4_computers2048204800---0.002--0.199%
2003-12-23Team Prime Ribv4_computers1000010000---0.001--0.120%
2010-11-05markrtiny1050002310000---0.028--2.303%
2015-04-29VictordeHollanderManual testing100000020000000---0.251--5.055%
2022-11-06Jocelyn LaroucheManual testing120000033722188502789.65922.810.50145.6310.507%
2022-11-12riccardo ubertiXeon20C1500000010450584144043141.327704.40.5011,40917.576%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-11-14riccardo ubertiColab_noGPU14500000010000000027--1.564
2022-11-15riccardo ubertiColab_noGPU14575000012000000065--1.831


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23Mark RoseManual testing21260--0.052--
2009-02-13Sturle Sundewright.ifi260261--0.052--
2011-12-24markroldgamer261262--0.104--
2013-01-07dbaughManual testing262263--0.333--
2015-04-27VictordeHollanderManual testing263264--0.667--
2015-04-27VictordeHollanderManual testing264265--1.269--
2016-02-24ramgeisManual testing265266--2.538--
2017-11-28Gordon SpenceManual testing266267--5.075--
2018-12-24chuenkitManual testing267268--10.15--
2021-05-19TJAOIManual testing268269--20.30--


ECM factoring results:
Total ECM effort:16.872 GHz-days
Estimated T-Level:22.473
DigitsB1CompleteFacMiss
20110005.3210.489%
25500000.49560.981%
302500000.03196.915%
3510000000.00199.853%


ECM Summary

B1B2factorcurvesGHz-days
5000050000009511.00
500006750000141.869
50000690000070.945
50000700000070.952
5000014400000102.109


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1997-01-01Marco Voerman3E941E4ACFD1385D0.251
1999-05-09ANONYMOUSv4_computers3E941E4ACFD1385D0.251
2018-10-11kkmrkkblmbrbkold3E941E4ACFD1385D0.251


PRP results:
dateuseridcompidcofactorsres64PRP
2022-11-11riccardo ubertiColab_noGPU11
977421837151463968096323383
704FF202FC92C4__no
2022-11-12riccardo ubertiColab_noGPU11
977421837151463968096323383
3497362970559580926461223756498259766199409
704FF202FC92C4E3no


P-1 factor-bounds graph:
B1 = 15000000, B2 = 104505841440 (P-1 stage 2)
B1 = 1200000, B2 = 3372218850 (P-1 stage 2)
B1 = 15000000 (P-1 stage 1)
B1 = 1000000, B2 = 20000000 (P-1 stage 2)
B1 = 1200000 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 105000, B2 = 2310000 (P-1 stage 2)
B1 = 105000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
107
108
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
269
268
267
266
265
264
263
262
261
260
this exponent TF target: 63
TF double-checked to: 67.9
ECM T-Level=22.47 ~= 58-bit
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2120
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Last modified: 2023-10-02T12:12:48+00:00