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Old 2022-07-09, 20:28   #23
MattcAnderson
 
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"Matthew Anderson"
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welcome in new person
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Old 2022-07-09, 20:33   #24
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"Matthew Anderson"
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Have a nice day
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Old 2022-07-09, 20:33   #25
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Do it again and you will be put in the sin bin for a while.
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Old 2022-07-10, 00:25   #26
MattcAnderson
 
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All possible
Have a nice day

In my world, conjecture is like probably true
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Old 2022-07-10, 00:58   #27
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Sounds good
smile

Last fiddled with by MattcAnderson on 2022-07-10 at 01:34
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Old 2022-07-10, 02:49   #28
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Old 2022-11-17, 15:20   #29
MattcAnderson
 
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Primes as not a possible numerical anagram ... interesting
Here is some simple minded Maple code. The hardest part was counting all the 2s.

> for a from 2 by 2 to 100 do
if isprime(222222222222222219+a) then print(222222222222222219+a, "is prime") end if end do;

222222222222222221, "is prime"
222222222222222281, "is prime"
A pair of p18. (18 digit prime numbers)

Have a nice day.
I put another code snippet at my web-page - mattanderson.fun
Try to find under "more files" 'prime but not anagram.txt'

okay, after some manual searching, I found a not-anagram cosisting of 63 twos and one 7.

> for a from 2 by 2 to 100 do
if isprime(2222222222222222222222222222222222222222222222222222222222222219+a)
then print(2222222222222222222222222222222222222222222222222222222222222219+a, "is prime") end if end do;

2222222222222222222222222222222222222222222222222222222222222227, "is prime"
2222222222222222222222222222222222222222222222222222222222222287, "is prime"

> evalf(log10(2222222222222222222222222222222222222222222222222222222222222219+a));
63.34678751
> # so we are looking at a pair of 64 digit prime numbers. - maybe an original calculation (?World record?)
>
>
Anyone else can find bigger not-anagram primes using a similar technique.

> for a from 2 by 2 to 1000 do
if isprime(22222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222219+a)
then print(22222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222219+a, "is prime")
end if end do;

22222222222222222222222222222222222222222222222222222222222222222222222222222\

222222222222222223, "is prime"



> evalf(log10(22222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222223));
94.34678747
> # a 95 digit number
>
>

It is clear to me that anyone with the right software, and a little effort, one can find bigger than a 95 digit ,
not an anagram prime number.
Maple is a fine tool.
Have a nice day.




Wishing you all the best.

Last fiddled with by MattcAnderson on 2022-11-17 at 16:09 Reason: point to mattanderson.fun
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Old 2022-11-17, 21:19   #30
Batalov
 
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Quote:
Originally Posted by MattcAnderson View Post
Primes as not a possible numerical anagram ... interesting
222222222222222221, "is prime"
222222222222222281, "is prime"
A pair of p18. (18 digit prime numbers)
...etc...
Every input is valuable. But all of what you wrote are not anagrams.
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Old 2022-11-17, 21:40   #31
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Default I found a thing

Since I have a handy dandy tool that can deal with large integers (Maple Software)
I have found a 121 digit prime.

> temp := 2222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222221;
tem2 := 2222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222227;
if isprime(temp) then print(temp, " is prime") end if;
if isprime(tem2) then print(tem2, "is prime") end if;
22222222222222222222222222222222222222222222222222222222222222222222222222222\

22222222222222222222222222222222222222222221, " is prime"
> evalf(log10(temp));
120.3467875
> # so we have found a 121 digit prime number such that any permutation of its digits yields a composite number.
# good fun :--)

# Matt

And to be sure, an anagram deals with the English language.
This is a fast and loose post.
Cheers !!!
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Old 2022-11-17, 23:50   #32
chalsall
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Quote:
Originally Posted by MattcAnderson View Post
This is a fast and loose post.
So is this.

Imagine a young child with a C64, and a subscription to Scientific American.

While that child worked at a sawmill to pay for his later education.

And coded... Day in. Day out...

And, stayed away many nights wondering if there really was a dog...

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