Help me please solve this equation with pari gp

dimas · 2021-12-06, 10:05

find all primes not exceeding 10 ^ 8, in the ternary notation of which the number of twos is equal to the total number of zeros and ones
it should be 187914

paulunderwood · 2021-12-06, 11:21

Code:

c=0;forprime(p=3,10^8,V=digits(p,3);W=[0,0,0];for(v=1,#V,W[V[v]+1]++);if(W[3]==W[2]+W[1],c++));c                                                               
187914

xilman · 2021-12-06, 17:07

Quote:

Originally Posted by Dr Sardonicus

EDIT: As my blood caffeine rose to working level.

Please be careful. Hypocaffeinaemia can be dangerous and lead to serious consequences.

https://dilbert.com/strip/1998-06-07

Batalov · 2021-12-06, 18:08

This looks like a homework (and wrong forum), and now the homework is ruined.
S/he will simply turn it in and get credit that s/he doesn't deserve.

paulunderwood · 2021-12-06, 18:31

Quote:

Originally Posted by Batalov

This looks like a homework (and wrong forum), and now the homework is ruined.
S/he will simply turn it in and get credit that s/he doesn't deserve.

chalsall · 2021-12-06, 18:34

Quote:

Originally Posted by Batalov

S/he

"They" also works (at least, in English)...

Batalov · 2021-12-06, 19:29

One shall be ashamed of credit that they didn't deserve.

EdH · 2021-12-06, 20:09

Quote:

Originally Posted by Batalov

This looks like a homework (and wrong forum), and now the homework is ruined.
S/he will simply turn it in and get credit that s/he doesn't deserve.

This was my first thought, but did PaulU actually give the answer wanted? The OP seemed (to me) to ask for a list of those primes, rather than a count There is still work to do on the OP's part to study how to get the listing of primes.

Batalov · 2021-12-07, 01:23

Quote:

Originally Posted by EdH

This was my first thought, but did PaulU actually give the answer wanted? The OP seemed (to me) to ask for a list of those primes, rather than a count There is still work to do on the OP's part to study how to get the listing of primes.

That's like when a college student is required to run a mile, and instead asks you to give them a lift to 10 feet from the finish line. "I will still have to run 10 feet, right?"

EdH · 2021-12-07, 03:14

Quote:

Originally Posted by Batalov

That's like when a college student is required to run a mile, and instead asks you to give them a lift to 10 feet from the finish line. "I will still have to run 10 feet, right?"

Yeah! That's right. Your avatar is quite fitting. . .

Batalov · 2021-12-07, 04:07

Quote:

Originally Posted by EdH

Yeah! That's right. Your avatar is quite fitting. . .

Exactly.
But the bigger question is "which avatar?"
which of them? there is a dozen

2021-12-06, 10:05	#1
dimas Dec 2021 1₂ Posts	Help me please solve this equation with pari gp find all primes not exceeding 10 ^ 8, in the ternary notation of which the number of twos is equal to the total number of zeros and ones it should be 187914

2021-12-06, 11:21	#2
paulunderwood Sep 2002 Database er0rr 1000001101001₂ Posts	Code: c=0;forprime(p=3,10^8,V=digits(p,3);W=[0,0,0];for(v=1,#V,W[V[v]+1]++);if(W[3]==W[2]+W[1],c++));c 187914 Last fiddled with by paulunderwood on 2021-12-06 at 11:28

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2021-12-06, 18:08	#4
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 2681₁₆ Posts	This looks like a homework (and wrong forum), and now the homework is ruined. S/he will simply turn it in and get credit that s/he doesn't deserve.

2021-12-06, 19:29	#7
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 10011010000001₂ Posts	One shall be ashamed of credit that they didn't deserve.