SemiState Early 50yo retiree: paid lower rate of PRSI: pt time work to build up COAP?

I have taken early retirement from a semi state body.

I have been paying the lower rate of PRSI as this was the rate when I joined almost 30 years ago.

I am now in my early fifties and would like to do some part time work.

This would enable me to pay A rate PRSI contributions and entitle me to some form of contributory pension at 65/66.

What I would like to know is how much per week I need to earn to get a contribution. ?

I would also like to know how many years contributions I will need before I am entitled to a pension ?

Re: SemiState Early 50yo retiree: paid lower rate of PRSI: pt time work to build up C

Moved from Public Sector Pensions to Welfare and State Benefits
Title reworked to reflect question.

This site may help with calculating pension entitlement.

And here's the page which explains PRSI classes and contributions.