is 2 7961069 - 1
has 2396521 decimal digits
takes 1.822 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L5E3C752315985C13double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272120.126368.0556%30000008070112050146.822411.0684%266.948771.5913%
Target2673.732465.6716%5500060000000.12572.5648%3.858166.5521%
Difference+5+116.3939+2.3839%+2945000+8064112050+146.6967+8.5035%+263.0906+5.0392%

Known prime factors (1 factor, 156.0 bits, 0.00196005% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
79610699395423380915049662127930665723456776664982265747156.0415900855388211714822549541189583620476512
25 × 3 × 73 × 15787 × 259159 × 339239 × 380881 × 1822463 × 873979349		2023-07-0518224638739793492.337e+1016.37029.508

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-06-15Team Prime Ribv4_computers45000652500---0.026--1.077%
2012-08-23Squeeky_SquirrelT7500_22001000001925000---0.066--1.769%
2020-08-24storm55107700_Kaby_Lake29000058725006---0.197--2.820%
2023-07-05ThaZ-1703000000807011205047156.041146.83.643293.611.068%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-08-16ANONYMOUSv4_computers21261--0.039--
1998-08-24ANONYMOUSv4_computers21262--0.077--
1998-08-30ANONYMOUSv4_computers21263--0.200--
2013-10-02NesowaManual testing263264--0.247--
2013-12-22David CampeauManual testing264265--0.469--
2015-06-03VictordeHollanderManual testing265266--0.939--
2016-08-20Gordon SpenceManual testing266267--1.877--
2018-07-24ramgeisManual testing267268--3.755--
2020-03-06TJAOIManual testing268269--7.509--
2020-09-27-Anonymous-Manual testing269270--15.02--
2021-12-08mikrManual testing270271--30.04--
2023-08-10riccardo ubertiGPU72_TF271272--60.07--


ECM factoring results:
Total ECM effort:2.088 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000062.088


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-10-07ANONYMOUSv4_computers5E3C752315985C131.822
2002-06-29Team Prime Ribv4_computers5E3C752315985C131.822
2002-09-14ANONYMOUSv4_computers5E3C752315985C131.822


PRP results:
dateuseridcompidcofactorsres64PRP
2023-07-05Naegi Makoto12500H
93954233809150496621279306657234567766649822657
D05B4DAECB55814Ano


P-1 factor-bounds graph:
B1 = 3000000, B2 = 8070112050 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 290000, B2 = 5872500 (P-1 stage 2)
B1 = 290000 (P-1 stage 1)
B1 = 100000, B2 = 1925000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 45000, B2 = 652500 (P-1 stage 2)
B1 = 45000 (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: 67
TF double-checked to: 67.9
ECM T-Level=1.15 ~= -13-bit
250
260
270
280
290
2100
2110
2120
2130
2140
2150
2160
Last modified: 2023-09-25T11:53:03+00:00