public void Test1()
{
/*
* The number 3797 has an interesting property. Being prime itself, it is possible to continuously remove digits from left to right, and remain prime at each stage: 3797, 797, 97, and 7.
* Similarly we can work from right to left: 3797, 379, 37, and 3.
* NOTE: 2, 3, 5, and 7 are not considered to be truncatable primes.
*/
var sut = new E037Truncatableprimes(10000);
Assert.False(sut.IsTruncatableprime(419));
Assert.True(sut.IsTruncatableprime(3797));
Assert.False(sut.IsTruncatableprime(3795));
Assert.False(sut.IsTruncatableprime(4297));
}
public void Solution()
{
/*
* Find the sum of the only eleven primes that are both truncatable from left to right and right to left.
*/
var sut = new E037Truncatableprimes(1000000);
Assert.Equal(748317, sut.GetSumOfTruncatableprime(numberof: 11));
/*
* Congratulations, the answer you gave to problem 37 is correct.
* You are the 64873rd person to have solved this problem.
*/
}