4(2+3)-1=19
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The only numbers that go into 19 are 1 and 19, 19 is the only prime number that goes into 19.
19 = 4 x 4 + 4/4no man. the ans is19 = (4 x 4) + (4-4/4)
19 of them
[ 1 x 19 ] is the only one.
Once with a remainder of eleven