Largest known prime not Mersenne?

[Orgasmic Troll]

Originally Posted by Ed Sandifer, "How Euler Did It"

Several Mersenne primes are known, and for several decades, the largest
known prime number was usually a Mersenne prime. This is no longer the case.

Am I misreading this?

Here is the article

[Numbers]

According to Chris Caldwell,
http://primes.utm.edu/notes/by_year.html#table2

the last time the largest prime was not Mersenne was 1989.

So I guess the guy just made a mistake.

[Orgasmic Troll]

Originally Posted by Numbers

According to Chris Caldwell,
http://primes.utm.edu/notes/by_year.html#table2

the last time the largest prime was not Mersenne was 1989.

So I guess the guy just made a mistake.

Normally I would just blow off an error like that, but the guy writes articles for the MAA, so I'd expect him to be up on his stuff. I was wondering if there's some reason why he would write that.

[ppo]

Not in the referred article for what I could understand.

[Orgasmic Troll]

Originally Posted by ppo

Not in the referred article for what I could understand.

It's on the first page, right after theorem 276

[ppo]

Sorry, what I was trying to say is that there is nothing else in the article to give support to such statement.