Chance of pregnancy w/60 seconds of penetration w/no ejaculation then or days previous? pre-ejaculate itself has no sperm. residual only in urethra.

Small but depends:: This depends on when this happened in relation to ovulation. Pre-ejaculate contains some sperm in about 40% of men. Since it has less volume/less sperm than regular ejaculation it's less likely to result in pregnancy but if this happened within 5 days of ovulation pregnancy is possible, up to 10% with normal ejaculation close to ovulation. See https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3564677/