There are 5: 11,13,17,19,23
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No, because it is dividable by more than 1 and 824. You can also divide it by 2, 4, and other numbers.
824 and any multiple of 824 is divisible by 824.
There are (1780 - 131) = 1649 numbers on the list.The one in the middle is 1/2(1780 + 132) = 956.There are 824 numbers above it, and 824 numbers below it.Use them to make pairs, like this:132 + 1780 = 1912133 + 1779 = 1912134 + 1779 = 1912..954 + 958 = 1912955 + 957 = 1912Each pair adds to 1912. There are 824 pairs. Their sum is (824) x (1912) = 1,575,488Don't forget to add the one in the middle: 1,575,488 + 956 = 1,576,444-- With danken und apologies to Dr. Gauss.
0.0097
The GCF is 8.