This may help you from PDF page 4
https://mycentralstatespension.org/media/9799/pl_pen_spd_15plus.pdf
Contribution-Based Pension Early Retirement Reductions Use this chart to determine the amount of the Contribution-Based Pension reduction for retirement before age 65 (with less than 20 years of Credit) or before age 62 (with at least 20 years of Credit). Contribution-Based Pension Early Retirement Factors Examples: Irene has less than 20 years of Credit and her unreduced Contribution-Based Pension is $758.20 at age 65. If she retires at age 61, Irene’s benefit would be $576.23 ($758.20 times 0.76). Rick has at least 20 years of Credit and his unreduced Contribution-Based Pension is $2,345.80 at age 62. If he retires at age 59, Rick’s benefit would be $1,923.56 ($2,345.80 times 0.82). Age 5-19 Years 20+ Years 65+ 1.00 1.00 64 0.94 1.00 63 0.88 1.00 62 0.82 1.00 61 0.76 0.94 60 0.70 0.88 59 0.64 0.82 58 0.58 0.76 57 0.52 0.70