First time Lucas-Lehmer assignments are no longer available. PRP testing with proofs using prime95 version 30.3 or later or gpuowl for GPUs is the preferred method for first-time primality tests.

Manual assignments are good for only six months. Furthermore, P-1 and TF assignments near the smallest available first-time and double-check assignments may be good for only one month. Assignments can be extended manually.

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