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Old 2018-12-18, 14:33   #89
enzocreti
 
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Default 51456

51456 divides pg(541456)-pg(51456) with pg(541456) and pg(51456) both probable primes is that coincidence?

Last fiddled with by enzocreti on 2018-12-18 at 14:41
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Old 2018-12-18, 15:13   #90
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51456 divides pg(541456)-pg(51456) with pg(541456) and pg(51456) both probable primes is that coincidence?
51456 is 2^8 * 3 * 67 that makes it a product of divisors of other things that divide the difference. It therefore, also must divide into the difference.
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Old 2018-12-18, 17:12   #91
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51456 is 2^8 * 3 * 67 that makes it a product of divisors of other things that divide the difference. It therefore, also must divide into the difference.

Is it just a coincidence that 51456 is a multiple of 67 and pg(541456)-pg(51456) is a multiple of 67?
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Old 2018-12-18, 17:15   #92
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Is it just a coincidence that 51456 is a multiple of 67 and pg(541456)-pg(51456) is a multiple of 67?
Non è una coincidenza, è una esplicita costruzione matematica.
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Old 2018-12-18, 17:20   #93
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My phone number is congruent to 46 mod 201, any explanation?
9091 is the unique prime whose reciprocal has period 10. It is -- wait for it -- 46 mod 201. Coincidence? I think not.

Last fiddled with by CRGreathouse on 2018-12-18 at 17:36 Reason: only known -> unique
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Old 2018-12-18, 17:25   #94
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Non è una coincidenza, è una esplicita costruzione matematica.
La prova?
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Old 2018-12-18, 17:33   #95
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Originally Posted by enzocreti View Post
La prova?
Puoi trovarla anche da te.

Se "costruisci" un elemento utilizzando prodotti dei fattori del secondo, è normale che il primo ed il secondo abbiamo fattori in comune (e quindi alcuni modulo).
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Old 2018-12-18, 17:40   #96
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Quote:
Originally Posted by enzocreti View Post
La prova?
you can regroup the prime factorization of a number n divisible by p into the factorization of p and the factorization of another number.
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Old 2018-12-18, 17:48   #97
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Originally Posted by science_man_88 View Post
you can regroup the prime factorization of a number n divisible by p into the factorization of p and the factorization of another number.

pg(51456) and pg(541456) are probable primes.


Why their difference is a multiple of 67?
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Old 2018-12-18, 18:29   #98
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Quote:
Originally Posted by ET_ View Post
Puoi trovarla anche da te.

Se "costruisci" un elemento utilizzando prodotti dei fattori del secondo, è normale che il primo ed il secondo abbiamo fattori in comune (e quindi alcuni modulo).
Ma io no ho costruito nulla...quei primi nascono naturalmente dalla concatenazione in base dieci di due concsecutivi numeri di Mersenne...innanzitutto mi pare quantomeno curioso che uno dei primi sia pg(51456) e l'altro pg(541456) con quel 4 inserito in mezzo. E poi perché la differenza di questi due primi è proprio un multiplo di 67?
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Old 2018-12-18, 18:33   #99
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Quote:
Originally Posted by enzocreti View Post
Why their difference is a multiple of 67?
It can be a difference that's a multiple of basically any natural number you want.


No if the difference wouldn't be a multiple of 67, then 51456 would not divide the difference

Last fiddled with by enzocreti on 2018-12-18 at 18:45
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