Old yeast slurry in the fridge

[z-bob]

I have a 1.5 pint Mason jar of WY3333 yeast slurry in my fridge, from January 2017. It has been stored refrigerated the whole time. Still good? (it looks fine; I haven't opened it to smell it) If I want to keep this strain of yeast but don't plan to brew anything with it soon, should I use it to make a starter, then refrigerate (or freeze) that and pitch the rest of the old stuff?

 

[flars]

Quite old but it may be slightly possible there is some life in there. Use 100 ml of the yeast in a 1.010 1 liter starter to check for life. Use the shaken not stirred method or intermittent swirling instead of a stir plate. Easier to see krausen formation when a stir plate is not used.

 

[z-bob]

Thanks. How much DME is that?

 

[day_trippr]

28.5 grams (1 oz by weight) of DME in 1 liter -> 1.010 starter wort...
https://www.brewersfriend.com/yeast-pitch-rate-and-starter-calculator/

Cheers!