HI BuffaloBill,
In your case, It is also worth noting that if in your retirement year, you work for just one week at class A before the end of that year. You can claim 52 Credited Class A's for the previous tax year and 52 Credited Class A's from Jan of retirement year every year under the Change of Status rules. Your last paid D contribution changes from a Class ‘D’ to a Class ‘A’ contribution. To get the ones after retirement, you can then sign on for Class A credits yearly at your local Social Welfare office.
Example: if you retire on 1st July 25 - you work at class A for one week before year end - You can get credited Class A's from Jan 24 - age 70 (or until you qualify for State Pension)
See "Change of Status Credits" paragraph at:
h&ttps://www.gov.ie/en/publication/99f84f-operational-guidelines-prsi-credited-social-insurance-contributions/
Of course, all of these credits, will not be any use to you, unless you can reach 260 paid contributions, as already stated, you can now pay PRSI up to age 70 and an ARF may be the easiest way to get the paid contribution