I recently had a question about Mersenne primes. After getting the question wrong and looking up what they were I discovered an error in the question.
The question was:
What is the first Mersenne prime over 1000?
The answer given was 1279.
A Mersenne prime is a prime that is 1 less than a power of 2. 1280 is not a power of two.
The question should read instead: What is the first exponent over 1000 that results in a Mersenne prime?
This is correct, just to add some reference proof for the developers;
In the table, p is the exponent and Mp is the actual prime number, the 15th number(Mp = 21279 - 1) would be the first Mersenne prime exponent over 1000, not the actual prime number which is 386 digits long.
There’s also a question about what year Overwatch came out and it has the correct answer as 2014 and yet the actual correct answer of 2016 isn’t even an option.