found before ? - Page 3

science_man_88 · 2010-04-25, 20:30

mod 30 the 9,1,1,3 seem to convert to 29,1,11,13

science_man_88 · 2010-04-25, 20:34

mod 20 give numbers ending in 9,1,1,3 but seems to change between 9,11,1,3

and things like 19,1,11,13

CRGreathouse · 2010-04-25, 20:49

So what are the probabilities?

I calculated the actual occurrences up to 5 billion: 57.0%. This is pretty close to my number working mod 30. I suppose if I wanted to improve I could work mod 210... mod 20 is obviously worse than mod 30, and probably not better than mod 10.

science_man_88 · 2010-04-25, 20:56

mod 210 seems to keep the last digit accurate from what i can tell though that may have to be double checked.

CRGreathouse · 2010-04-26, 00:36

Quote:

Originally Posted by science_man_88

mod 210 seems to keep the last digit accurate from what i can tell though that may have to be double checked.

So... what are the probabilities?

I'm looking for "there are A possibilities out of B mod 30 for two digits preceding ,9,1,1,3, and C possibilities out of D mod 30 for the two digits following ,9,1,1,3, giving a total probability x% that ,9,1,1,3, is followed or preceded by 7,9."

Of course you could work mod 210 if you prefer.

science_man_88 · 2010-05-05, 16:24

Quote:

Originally Posted by kar_bon

A line of PARI-code and some digits won't understand anyone without a (very) closer look!

didn't know pari code was watching anyone

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2010-04-25, 20:30	#23
science_man_88 "Forget I exist" Jul 2009 Dartmouth NS 210D₁₆ Posts	mod 30 the 9,1,1,3 seem to convert to 29,1,11,13

2010-04-25, 20:34	#24
science_man_88 "Forget I exist" Jul 2009 Dartmouth NS 8,461 Posts	mod 20 give numbers ending in 9,1,1,3 but seems to change between 9,11,1,3 and things like 19,1,11,13

2010-04-25, 20:49	#25
CRGreathouse Aug 2006 2²·3·499 Posts	So what are the probabilities? I calculated the actual occurrences up to 5 billion: 57.0%. This is pretty close to my number working mod 30. I suppose if I wanted to improve I could work mod 210... mod 20 is obviously worse than mod 30, and probably not better than mod 10.

2010-04-25, 20:56	#26
science_man_88 "Forget I exist" Jul 2009 Dartmouth NS 8,461 Posts	mod 210 seems to keep the last digit accurate from what i can tell though that may have to be double checked.