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Old 2018-06-08, 21:36   #1
ixfd64
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Default I did a dou🅱️le 🅱️ackflip when I saw this residue

https://mersenne.org/report_exponent...0657053&full=1

Quote:
4CD14BBBBBBB66CE
Surprisingly, it's legit!

Last fiddled with by ixfd64 on 2018-06-12 at 01:18
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Old 2018-06-08, 22:01   #2
Batalov
 
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BBBBBBBut what do you see wrong w-w-w-w-w-with it?
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Old 2018-06-08, 22:18   #3
GP2
 
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I occasionally search for unverified exponents with a residue containing six repeated digits, and verify them. They're pretty rare, obviously.

Recent non-legit examples were 81857519 and 81857537 with FFFFFFFF800000__, which I posted about elsewhere. That user's other results are being double-checked by endless_mike, with a fair number of mismatches.
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Old 2018-06-09, 03:00   #4
retina
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The best possible residue would be 6666666666666666

A probability on the order of 2⁻⁶⁴, but one can hope.
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Old 2018-06-09, 08:40   #5
heliosh
 
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Did we had BADC0FFEE
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Old 2018-06-09, 13:19   #6
xilman
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Quote:
Originally Posted by retina View Post
The best possible residue would be 6666666666666666

A probability on the order of 2⁻⁶⁴, but one can hope.
Personally I'd rather see 00000000000000000
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Old 2018-06-09, 14:53   #7
retina
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Quote:
Originally Posted by xilman View Post
Personally I'd rather see 00000000000000000
Nah, those are too common. There are already 50 of them. Boring.
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Old 2018-06-09, 15:51   #8
pepi37
 
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Quote:
Originally Posted by retina View Post
Nah, those are too common. There are already 50 of them. Boring.
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Old 2018-06-09, 16:02   #9
kriesel
 
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Quote:
Originally Posted by xilman View Post
Personally I'd rather see 00000000000000000
Here you go:

badresidues=(
'cllucas', '0x0000000000000002, 0xffffffff80000000',
'cudalucas', '0x0000000000000000, 0x0000000000000002, 0xfffffffffffffffd',
'cudapm1', '0x0000000000000000, 0x0000000000000001',
'gpuowl', '0x0000000000000000',
);
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Old 2018-06-09, 18:56   #10
M344587487
 
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Quote:
Originally Posted by GP2 View Post
I occasionally search for unverified exponents with a residue containing six repeated digits, and verify them. They're pretty rare, obviously.

Recent non-legit examples were 81857519 and 81857537 with FFFFFFFF800000__, which I posted about elsewhere. That user's other results are being double-checked by endless_mike, with a fair number of mismatches.
I await the research paper on residues that contain 5318008 ;)
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Old 2018-06-09, 21:32   #11
science_man_88
 
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Quote:
Originally Posted by M344587487 View Post
I await the research paper on residues that contain 5318008 ;)
Only 10*16^9 so 3*10^-6 % of them.

Last fiddled with by science_man_88 on 2018-06-09 at 21:37
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