: The exact midpoint of this sequence is 3125.5 .
For classic (highly popular in the 1970s and 1980s), manufacturers stamped specific alphanumeric codes on the ignition cylinders and seat locks. Locksmiths utilize master lists to correlate these stamped codes to exact key cuts: [3101-3150]
Outside of specialized industrial applications, looking at the numbers 3101 through 3150 strictly through the lens of mathematics yields a few interesting characteristics: : The exact midpoint of this sequence is 3125
: There are exactly 7 prime numbers in this 50-number span (3109, 3119, 3121, 3137, 3149, and others). [3101-3150]