is 2 670616621 - 1
has 201875719 decimal digits
takes 21,740.708 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual28623,368.748365.1163 %----23,368.748365.1163 %
Target2845,842.186964.2857 %36000009000000002,464.99674.1521 %8,307.183665.7686 %
Difference+2+17,526.5614+0.8306 %-3600000-900000000-2,464.9967-4.1521 %+15,061.5647-0.6523 %

Known prime factors (1 factor, 86.9 bits, 0.00001296% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6706166211441629176435733530559151132786.898107485344926735236
22 × 349 × 2687 × 140527 × 203909
2017-01-1714052720390923,3696.768213.444

P-1 results:
No P-1 results for M670616621


Trial Factoring results:
575859606162636465666768697071727374757677787980818283848586
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-01-22monstbass2652660.011
2010-01-22monstbass2662670.022
2010-01-22monstbass2672680.045
2010-01-22monstbass2682690.089
2010-01-22monstbass2692700.178
2010-01-22monstbass2702710.357
2010-03-07monstbass2712720.713
2010-03-18monstbass2722731.426
2010-03-27monstbass2732742.853
2010-03-29monstbass2742755.705
2010-05-01monstbass27527611.41
2010-05-07monstbass27627722.82
2010-05-21monstbass27727845.64
2010-06-16monstbass27827991.28
2016-04-29monstManual testing279280182.6
2016-05-25monstManual testing280281365.1
2016-10-11monstManual testing281282730.3
2016-10-11monstManual testing2822831,461
2016-10-11monstManual testing2832842,921
2016-11-07monstManual testing2842855,842
2017-01-16monstManual testing28528611,684
2017-01-17monstManual testing286287*
86.898
27


ECM factoring results:
No ECM results for M670616621


Lucas-Lehmer results:
No L-L results for M670616621


PRP results:
No PRP results for M670616621


CERT results:
No CERT results for M670616621


P-1 factor-bounds graph:
104
105
106
104
105
106
TF factor-bounds graph:
286
285
284
283
282
281
280
279
278
277
276
275
274
273
272
271
270
269
268
267
266
this exponent TF target: 84
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00