is 2 7630379 - 1
has 2296973 decimal digits
takes 1.664 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LE8DB874AADC99411double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual273250.688068.4932%30000009477604500164.161810.4241%414.849771.7775%
Target2673.894265.6716%5000011000000.03392.4441%3.928166.5107%
Difference+6+246.7938+2.8215%+2950000+9476504500+164.1279+7.9799%+410.9217+5.2668%

Known prime factors (1 factor, 125.1 bits, 0.00163913% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
76303794470384418917064788376255638299332819138125.0722929333142506463170686708771805
5 × 163 × 1697 × 13619 × 222127 × 793889 × 881907343		2023-02-177938898819073432.102e+1015.42928.375

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-10ANONYMOUSv4_computers3500035000---0.011--0.229%
2011-04-14James HeinrichQ66001450003190000---0.098--1.913%
2023-02-17DRobinsonPE5600X3000000947760450038125.072164.23.328328.310.424%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-29ANONYMOUSv4_computers21261--0.040--
1999-03-01ANONYMOUSv4_computers21263--0.209--
2013-10-11NesowaManual testing263264--0.257--
2013-12-04David CampeauManual testing264265--0.490--
2015-06-09VictordeHollanderManual testing265266--0.979--
2016-09-14Gordon SpenceManual testing266267--1.959--
2018-07-31ramgeisManual testing267268--3.917--
2020-03-06TJAOIManual testing268269--7.835--
2021-04-08-Anonymous-Manual testing269270--15.67--
2021-04-08-Anonymous-Manual testing270271--31.34--
2021-05-02-Anonymous-Manual testing271272--62.68--
2021-05-03-Anonymous-Manual testing272273--125.4--


ECM factoring results:
Total ECM effort:1.989 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.989


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-10-07ANONYMOUSv4_computersE8DB874AADC994111.664
2002-04-07ANONYMOUSv4_computersE8DB874AADC994111.664


PRP results:
dateuseridcompidcofactorsres64PRP
2023-02-23RichD0Linux-7
44703844189170647883762556382993328191
A6B9B4E06CCD77C3no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 9477604500 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 145000, B2 = 3190000 (P-1 stage 2)
B1 = 145000 (P-1 stage 1)
B1 = 35000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
273
272
271
270
269
268
267
266
265
264
263
261
this exponent TF target: 67
TF double-checked to: 67.7
ECM T-Level=1.15 ~= -13-bit
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2023-03-25T13:08:14+00:00