Prime 59 is a number puzzle game where you fill a 6×6 grid using only prime numbers so that every row and column adds up to exactly 59.

What are prime numbers?

Prime numbers are numbers greater than 1 that can only be divided evenly by 1 and themselves. Examples include 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, and 31.

Is Prime 59 free to play?

Yes! Prime 59 is free to download and play. A premium subscription unlocks additional features like advanced stats, unlimited daily challenges, and ad-free gameplay.

Is there multiplayer?

Yes! Battle Mode lets you challenge friends with a direct link or get matched with players worldwide. Both players solve the same puzzle in real-time.

What platforms is Prime 59 available on?

Prime 59 is available on iOS (App Store), Android (Google Play), and the web at prime59.fun. Your account syncs across all platforms.

Is 187 a Prime Number? The Answer, Factorization, and Explanation

187 is not a prime number. It is a composite number because it can be factored as 11 × 17.

Is 187 Prime? The Direct Answer

No, 187 is not a prime number. A prime number has exactly two divisors: 1 and itself. 187 has more than two divisors, so it is composite.

Factorization of 187

The number 187 can be written as the product of two smaller positive integers: 11 × 17 = 187. Both 11 and 17 are prime numbers, so this is the prime factorization of 187.

Why Isn't 187 Prime?

A prime number can only be divided evenly by 1 and itself.
187 looks like it could be prime since it's odd and not divisible by 2, 3, or 5.
However, 11 × 17 equals 187, showing it has divisors other than 1 and 187.

How to Spot Composite Numbers Like 187 Faster

Quickly recognizing whether a number is prime or composite is a valuable skill in mental math. Practicing with games like Prime 59 helps you spot prime numbers under time pressure, letting you sharpen your ability to factor numbers like 187 on sight.

Train your eye for primes the fun way - Prime 59 is a free, race-the-clock prime-spotting game.

Try Prime 59

FAQ

Is 187 a prime number?

No, 187 is not a prime number. It is composite because it equals 11 × 17.

What are the factors of 187?

The factors of 187 are 1, 11, 17, and 187.

How do you know 187 is not prime?

Since 187 can be divided evenly by 11 and 17, it has more than two divisors and is not prime.

What is the prime factorization of 187?

The prime factorization of 187 is 11 × 17.

How can I get better at spotting primes like 187?

Playing mental math games such as Prime 59 can help you practice and improve your speed in identifying prime and composite numbers.