Goldbach's conjecture states that every even integer which is greater than 2 can be expressed as the sum of two prime numbers.
This has been shown to be correct for integers up to approx 4 quintillion but has not been proven.
The Poincaré Conjecture.
A counter-example.
Counter Example
A counter example is a statement that shows conjecture is false.
A counterexample.
A famous conjecture is the Twin prime conjecture, which states that there are infinitely many "twin primes" - primes which are 2 apart (for example, 11 and 13, or 17 and 19, are twin primes)
Counter-example
conuturexample
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Give a counter-example.
hypothesis
Example