Despite its power, v0.4.0 has specific limitations that users must acknowledge:
| Feature | Primer3 1.1.4 | Primer3 2.3.6 | Primer3 0.4.0 | |---------|---------------|---------------|-------------------| | Tm model | Breslauer 86 | SantaLucia 98 | SantaLucia 98 | | Salt correction | 1M only | Owczarzy 04 | Owczarzy 04 | | Degenerate primers | No | Yes | Yes | | Multiplex penalty | No | Yes | Partial (output only) | | API stability | Poor | Good | Excellent | | Thread safety | No | No | Yes | | Memory footprint | Low | Medium | Very low | primer3 0.4.0
Why choose 0.4.0 today? For embedded systems (Raspberry Pi, IoT lab devices) or batch processing on legacy servers (RHEL 5/6), 0.4.0 compiles with zero dependencies and runs in <2 MB RAM. Despite its power, v0
primer3_core < input.txt > output.txt
Input file contains sequence and parameter lines (e.g., SEQUENCE_TEMPLATE, PRIMER_TASK, PRIMER_MIN_SIZE, PRIMER_MAX_SIZE, PRIMER_PRODUCT_SIZE_RANGE). primer3_core < input