Question ID 930: What is the first Mersenne prime over 1000?
The answer given is 1,279, however this is the exponent in the Mersenne prime formula M(n) = 2^n − 1. 1,279 is not a Mersenne prime, neither of the given answers is. The correct answer should be 8191. Wiki article with the list of Mersenne primes and their exponents
This was actually mentioned previously in the post linked below some time ago. But it’s understandable you missed it because they actually put it into Trivia Suggestions instead of Open Trivia DB.
Just thought I’d link it here too.
Yeah, but the post is almost half a year old and it is still ignored :{ While the others are resolved quite quickly
Sorry we never replied to the previous thread, the answer posted in that thread was the correct answer.
The question is still present incorrectly though. I just checked.
Which?
ID 930 with the Mersenne primes.
The answer isn’t incorrect.
The first Mersenne Prime over 1000 is M1279. The next mersenne prime in the sequence after M1279 is M2203.
The last Mersenne Prime before 1000 is M607.
M1279 is not 1279. M1279 is 386-digit number. The largest Mersenne prime larger than 1000 is 8191 (M13). It is explained in my post and in the linked post.
That post you just linked proves you wrong, though. 1279 is the first Mersenne exponent over 1000, not the first Mersenne prime. The first Mersenne prime over 1000 is 8191.
The question’s wording has been adjusted.